Tuesday 2 June 2020

MCQ Science

                                                                        Science
                                            Class 10 { FOR  SLC /SEE }

Multiple Choice Questions Set D

1]    Which one is the most convincing hypothesis about the formation of the solar system?

a)    Old planetesimal hypothesis

b)    Nebular hypothesis

c)     Tidal hypothesis

d)    Dust hypothesis

2]    Who has suggested Nebular hypothesis?

a)    Immanuel Kant

b)    Laplace

c)     Both Immanuel Kant and Laplace

d)    None of the above

3]    When was the Dust Cloud Hypothesis suggested?

a)    1944 AD

b)    1917 AD

c)     1905 AD

d)    1749 AD

4]    How many times the density of our Earth is greater than the density of water at 4 0C?

a)    4.7

b)    5.7

c)     6.7

d)    7.7

5]    What is the mass of the earth?

a)    6 × 1024 kg

b)    6 × 1021 metric ton

c)     Both of the above

d)    None of the above

6]    According to International Union of Geological Sciences, Geological Time Scale is divided into four Eons. Which one is the longest Eon?

a)    Phanerozoic

b)    Protozoic

c)     Archean

d)    Hadean

7]    Which ‘Era’ is called Time of Amphibians?

a)    Palaeozoic era

b)    Mesozoic era

c)     Cenozoic era

d)    None of the above

8]    In which Era are the mammals evolved?

a)    Cenozoic era

b)    Palaeozoic era

c)     Mesozoic era

d)    In between Cenozoic and palaezoic era.

9]    In which ‘Era’ first man came on the earth?

a)    Cenozoic era

b)    Palaeozoic era

c)     Mesozoic era

d)    None of the above

10] Which one is worst type of coal?

a)    Lignite

b)    Bituminous

c)     Anthracite

d)    Sub-bituminous

11] Which one is obtained from petroleum?

a)    Diesel

b)    Petrol

c)     Natural gases

d)    All of the above

12] Petroleum contains X percent hydrocarbons. What is the value of X?

a)    60 % to 65 %

b)    70 % to 75 %

c)     30 % to 35 %

d)    90 % to 95 %

13] Generally, fossils are found in

a)    igneous rocks

b)    sedimentary rocks

c)     metamorphic rocks

d)    all of the above

14] Which hypothesis says that the solar system is formed slowly?

a)    Old planetesinal hypothesis

b)    New planetesinal hypothesis

c)     Dust cloud hypothesis

d)    Tidal hypothesis

15] When was the first life on the earth originated?

a)    7570 million years ago

b)    6000 million years ago

c)     3800 million years ago

d)    5000 million years ago

16] In which Era, human beings are originated?

a)    Cenozoic

b)    Mesozoic

c)     Phanerozoic

d)    Palaeozoic

17] Which one is the first life on the earth?

a)    Bacteria

b)    Virus

c)     Reptile

d)    mammal

18] Which is fossil fuel?

a)    Coal

b)    Petrol

c)     Natural gases

d)    All of the above

19] Which one is used to run light vehicles?

a)    Kerosene

b)    Diesel

c)     Petrol

d)    Air fuel

20] ‘Paraffin’ is a –

a)    Carbohydrate

b)    Carbon dioxide gas

c)     Hydrocarbon

d)    All of the above

21] Graphite is a form of –

a)    Carbon dioxide

b)    Carbon

c)     Carbon monoxide

d)    Hydrocarbon

22] Who has forwarded the first hypothesis for the origin of solar system?

a)    Immanuel Kant

b)    George Buffon

c)     James Jean

d)    Laplace

23] Ozone layer of the atmosphere lies in –

a)    troposphere

b)    stratosphere

c)     mesosphere

d)    thermosphere

24] The layer of the atmosphere, whose temperature decreases with increase in height from the surface of the earth, is –

a)    troposphere

b)    mesosphere

c)     both of the above

d)    neither (a) nor (b)

25] Which one is the hottest layer of the atmosphere?

a)    Troposphere

b)    Mesosphere

c)     Exosphere

d)    None of the above

26] Which one is the coldest layer of atmosphere?

a)    Exosphere

b)    Troposphere

c)     Thermosphere

d)    Stratosphere

27] Which one is the thinnest layer of atmosphere?

a)    Exosphere

b)    Mesosphere

c)     Troposphere

d)    Stratosphere

28] The thickness of the thermosphere of the atmosphere is –

a)    300 km

b)    340 km

c)     600 km

d)    640 km

29] Ozone is the molecule of oxygen having

a)    two atoms of oxygen.

b)    three atoms of oxygen.

c)     two atoms of oxygen with one atom of zinc.

d)    one atom of zinc with three atoms of oxygen.

30] Percentage of air present in troposphere is

a)    70 %

b)    80 %

c)     85 %

d)    90 %

31] Temperature of air in stratosphere –

a)    increases with increase in height.

b)    decreases with increase in height.

c)     neither increases nor decreases with height, it remains unaltered.

d)    first increases and then decreases with height.

32] Cloud of stratosphere is called –

a)    Aurora

b)    Cirrus

c)     Stratosphere

d)    Titan

33] Fringe Region is another name of –

a)    Exosphere

b)    Stratosphere

c)     Mesosphere

d)    Thermosphere

34] Ionosphere is another name of –

a)    Thermosphere

b)    Mesosphere

c)     Troposphere

d)    None of the above

35] Depletion of ozone layer over Antarctica was found in 1985 AD, which was termed as ozone hole. What is the name of the scientist, who found it?

a)    John Kepler

b)    Galileo

c)     Copernicus

d)    J.C. Farmann

36] Which are the Green house gases?

a)    CO2. N2O, CH4

b)    N2O, CH4, H2O-vapour

c)     CH4, H2O-vapour, CO2

d)    All of the above

37] Due to depletion of ozone layer, UV-rays may affect human health, which may cause –

a)    Skin cancer

b)    Skin cracks

c)     Cataract

d)    All of the above

38] The process, by which effect of climate change is minimized, is called –

a)    mitigation

b)    adaptation

c)     mutation

d)    ionization

39] In a Green House –

a)    Short waved light rays can not enter

b)    Long waved light rays can not enter but can escape out from it.

c)     Short waved light rays can enter the house but can not escape out from the house, as it is changed into long waved light rays.

d)    None of the above

40] The main factors, which causes depletion of ozone layer are chlorofluorocarbons (CFCs). Who has invented CFCs?

a)    J.C. Farmann

b)    Thomas Midgley

c)     Chapman

d)    J.C. Farmann and Chapman

41] ‘Aurora’ is the display of coloured light on the earth, which is seen –

a)    at equator

b)    at the north pole

c)     at the south pole

d)    both polar regions

42] Which of the following sets of gases are industrial gases?

a)    Hydrogen, oxygen and nitrogen

b)    Nitrogen, ammonia and methane

c)     Methane, ammonia and methane

d)    Methane, ethane and propane

43] “Global Warming” is caused by –

a)    depletion of ozone layer

b)    green house effect

c)     both (a) and (b)

d)    neither (a) and (b)

44] Ozone layer depletion affects-

a)    human health

b)    animal health

c)     global warming

d)    all of the above

45] Which one of the followings is spiral shaped galaxy?

a)    Andromeda

b)    IC 1613

c)     Formax

d)    None of the above

46] There are X constellations in our universe (yet known). The value of X is –

a)    78

b)    80

c)     88

d)    98

47] Which of the following is known as red planet?

a)    Earth

b)    Mars

c)     Jupiter

d)    Venus

48] When we keep a planet in water (if possible), it floats. Which planet is that?

a)    Earth

b)    Jupiter

c)     Venus

d)    Saturn

49] The planets having no satellite are –

a)    Mercury and Mars

b)    Mars and Uranus

c)     Uranus and Venus

d)    Venus and Mercury

50] The farthest planet from the sun is –

a)    Pluto

b)    Uranus

c)     Neptune

d)    None of the above

51] The first person, who stepped on the moon, was Neil Armstrong. When did he step there?

a)    20th July 1969 AD

b)    21st July 1996 AD

c)     20th June 1960 AD

d)    25th June 1965 AD

52] Artificial satellites are established in the sky for the following purpose –

a)    For weather forcasting

b)    For communication

c)     For navigation

d)    All of the above

53] Asteroid belt lies between –

a)    Venus and Mars

b)    Mars and Earth

c)     Earth and Jupiter

d)    Jupiter and Mars

54] The comet Shoemaker –Levi was first seen in 1993 AD, and collided in 1994 AD with –

a)    Earth

b)    Saturn

c)     Jupiter

d)    Mars

55] The tail of a comet disappears, when –

a)    it moves nearer to the sun.

b)    it moves away from the sun.

c)     the sun rises on the part of the earth where we are.

d)    All of the above.

56] Titan is a satellite of –

a)    Saturn

b)    Jupiter

c)     Uranus

d)    Mars

57] Nix Olympia (Olympus) is a extinct volcano on the surface of a planet, which is nearly three times greater in height than mount Everest on the earth’s surface. Which planet is that?

a)    Mars

b)    Neptune venus

c)     Saturn

58] The hottest planet is –

a)    Mercury

b)    Venus

c)     Mars

d)    Earth

59] Which planet is called evening star?

a)    Jupiter

b)    Saturn

c)     Mars

d)    Venus

60] How many constellations are also used signs of zodiac (RASHIS)?

a)    10

b)    11

c)     12

d)    16

61] Which of the following constellation is not used as a sign of zodiac (RASHIS)?

a)    Ursa minor

b)    Ursa major

c)     Orion

d)    All of the above

62] According to International union of Astronomers (IUA), a planet must have following properties.

a)    It must have it’s own elliptical orbit around the sun.

b)    It’s shape must be round.

c)     It’s orbit around the sun must not intersect other planet’s orbit.

d)    All of the above.

63] The set of the planets, which lie under inner planets is –

a)    Earth, Mars, Venus and Jupiter

b)    Mercury, Mars, Venus and Saturn

c)     Earth, Mercury, Venus and Mars

d)    Jupiter, Saturn, Uranus and Neptune

64] Mass of the sun is nearly –

a)    2 × 1024 kg

b)    2 × 1030 kg

c)     3 × 1030 kg

d)    3 × 1024 kg

65] The closest galaxy to our Milky-Way is –

a)    Andromeda

b)    Formax

c)     Sculpter

d)    None of the above

66] Which of the following twinkles?

a)    Earth

b)    Jupiter

c)     Venus

d)    None of the above

67] The second largest planet is –

a)    Neptune

b)    Uranus

c)     Saturn

d)    Earth

68] The second smallest planet is –

a)    Venus

b)    Mars

c)     Mercury

d)    None of the above

69] The fastest spinning planet is –

a)    Jupiter

b)    Saturn

c)     Mercury

d)    Earth

70] The fastest revolving planet is –

a)    Earth

b)    Jupiter

c)     Mercury

d)    Venus

71] The planet, whose density is smaller than the density of water, is –

a)    Saturn

b)    Uranus

c)     Neptune

d)    Jupiter

72] A silkworm belongs to the class –

a)    Crustacea

b)    Insecta

c)     Diplopoda

d)    Chilopoda

73] Life cycle of a silkworm completes in about –

a)    35 days

b)    50 days

c)     85 days

d)    90 days

74] Number of legs of a silkworm are –

a)    6

b)    8

c)     10

d)    4

75] Average length of a silk fiber, obtained from one cocoon of silkworm is –

a)    10 m

b)    50 m

c)     100 m

d)    1000 m

76] Two types of silkworms, which are reared in Nepal, are –

a)    Cheri and Eri

b)    Cheri and Seri

c)     Seri and Eri

d)    None of the above

77] Abdomen of a silkworm is divided into X segments. The value of X is –

a)    3

b)    5

c)     9

d)    10

78] The silkworms SERI feed on –

a)    Blackberry leaves

b)    Mulberry leaves

c)     Strawberry leaves

d)    Cherry leaves

79] SERI silkworm is called –

a)    Bombax Mori

b)    Chinese silkworm

c)     Mulberry silkworm

d)    All of the above

80] Which stage of the life cycle of a silkworm produces silk fibre?

a)    Egg

b)    Larva

c)     Pupa

d)    Adult

81] Which body part of a worker honey bee has a pollen basket to collect nectar from the flowers?

a)    Legs

b)    Mouth

c)     Wings

d)    Abdomen

82] Which kinds of honey bee are known as the Busiest and Hardworking bees?

a)    The workers

b)    The drones

c)     The Queen

d)    All of the above

83] How many Eggs laying female honey bees are there in a colony of honey bees?

a)    1

b)    2

c)     3

d)    5

84] The importance of silkworm in the production of natural silk was first known in –

a)    Japan

b)    Korea

c)     China

d)    America

85] Silk glands of the silkworms are the modified forms of –

a)    Pituitary glands

b)    Salivary glands

c)     Gastric glands

d)    Intestinal glands

86] Which stage of the life cycle of the silk moth is called Caterpillar?

a)    Egg

b)    Larva

c)     Pupa

d)    Adult

87] Which one is a domestic bee?

a)    Apis florea

b)    Apis dorsata

c)     Apis melitera

d)    Apis laboriosa

88] The study of Bees is called –

a)    Melittology

b)    Apicology

c)     Both of the above

d)    None of he above

89] Worker honey bees are produced from –

a)    Unfertilized eggs

b)    Fertilized eggs

c)     Semi fertilized eggs

d)    All of the above

90] Which of the following is produced from unfertilized eggs?

a)    Queen bees

b)    Worker bees

c)     Drone bees

d)    All of the above

91] The farming (keeping) of silk moth for silk fibre is called –

a)    Sericulture

b)    Apiculture

c)     Agriculture

d)    None of the above

92] Whose life is the longest?

a)    Drone bees

b)    Worker bees

c)     Queen bees

d)    Same life span of all the above

93] Which type of eggs are laid by a Queen Bee?

a)    Fertilized eggs only

b)    Unfertilized eggs only

c)     Both, fertilized and unfertilized eggs

d)    A Queen does not lay eggs, eggs are layed by worker bees.

94] Nectar and pollen grains from flower are collected by –

a)    Queen bees

b)    Drone bees

c)     Worker bees

d)    All of the above

95] A worker bee takes part in mating with a Queen bee –

a)    Only one time in it’s life time

b)    Twice in it’s life time

c)     Thrice in it’s life

d)    Never

96] Honey, obtained from honey bees, contains –

a)    Vitamin A

b)    Vitamin B

c)     Vitamin E

d)    All of the above

97] Honey bees are very important to us, because they –

a)    Give us honey

b)    Give us wax

c)     Pollinate flowers

d)    All of the above

98] In acid rain, which acid is found in maximum amount?

a)    HCl

b)    HNO3

c)     H2SO4

d)    H2CO3

99] What is molecular formula of Caro’s Acid?

a)    H2CO3

b)    H2SO4

c)     H2SO5

d)    H2SO7

100]               Marshal acid is –

a)    H2S2O8

b)    H2S2O7

c)     H2SO5

d)    H2SO4

101]               Teflon (a kind of thermosetting plastic) contains halogen. Which halogen is that?

a)    Chlorine

b)    Fluorine

c)     Bromine

d)    Iodine

102]               Which is used as a Tear-Gas?

a)    Hydrogen

b)    Nitrogen

c)     Chlorine

d)    Sulphur dioxide

103]               One of the following is a coloured gas. Which one is that/

a)    Nitrogen

b)    Carbon dioxide

c)     Methane

d)    Chlorine

104]               Which of the halogens is used as germicide, (to purify water)?

a)    Chlorine

b)    Fluorine

c)     Iodine

d)    Bromine

105]               Which of the following is a liquid and non-metal?

a)    Mercury

b)    Bromine

c)     Sulphur

d)    Iodine

106]               Which of the followings is in solid state at normal temperature?

a)    Iodine

b)    Bromine

c)     Chlorine

d)    Fluorine

107]               Hydrochloric acid is also known as ………

a)    Muriatic acid

b)    Gallic acid

c)     Citric acid

d)    Sylisilic acid

108]               Glass is soluble in ……….

a)    HCl

b)    H2SO4

c)     HNO3

d)    HF

109]               Generally, a liquid flows downward. Which one of the following liquids, climb wall of it’s glass container?

a)    Liquid nitrogen

b)    Liquid helium

c)     Liquid water

d)    Petrol

110]               All the inert gases have eight electrons in it’s outermost shell except ……………

a)    Neon

b)    Helium

c)     Krypton

d)    Argon

111]               Generally, a tube light is filled with ………….

a)    Hg-vapour + Helium

b)    Hg-vapour + Chlorine

c)     Hg–vapour + Argon

d)    Hg-vapour + Methane

112]               Which inert gas is formed in our atmosphere in maximum amount?

a)    Helium

b)    Neon

c)     Argon

d)    Xenon

113]               Which nobel gas is not found in our atmosphere?

a)    He

b)    Ne

c)     Ar

d)    Rn

114]               Diamond is a form of ………

a)    Silicon

b)    Silver

c)     Gold

d)    Carbon

115]               The non-metal having metallic lustre is ………..

a)    Sulphur

b)    Phosphorus

c)     Iodine

d)    Radon

116]               Ozone layer is mainly found in ……

a)    Troposphere

b)    Stratosphere

c)     Mesosphere

d)    Thermosphere

117]               Which of the following is called stranger gas?

a)    Argon

b)    Xenon

c)     Neon

d)    Krypton

118]               Which one of the followings is a metalloid?

a)    Plastic

b)    Aluminium

c)     Germanium

d)    Sulphur

119]               If carbon dioxide gas is totally removed from the atmosphere, temperature of the atmosphere ………

a)    Increases slowly

b)    Decreases slowly

c)     Nitrogen plays an important role to control the rise in temperature and remains unchanged.

d)    Oxygen plays an important role to control the fall in temperature.

120]               The acid, which is used in a battery, is ……..

a)    H2SO4

b)    HNO3

c)     H2CO3

d)    HCl

121]               The main gas, which is found in Biogas, is ……….

a)    CH4

b)    C3H8

c)     C5H12

d)    CO2

122]               The main gas, which is found in Natural gas, is ………..

a)    CH4

b)    CO

c)     SO2

d)    C4H10

123]               Marsh gas is …………….

a)    C3H8

b)    C2H2

c)     C2H4

d)    CH4

124]               The main gas, which is present in Gobar Gas, is …………

a)    CH4

b)    C3H6

c)     SO2

d)    NO2

125]               Which one is Homologous series ……….

a)    CH4 , C2H2 , C3H4 , C4H8

b)    C2H2 , C3H6 , C4H8 , C5H10

c)     CH3OH , C2H5OH , C3H7OH , C4H9OH

d)    Both (b) and (c)

126]               Which one is green house gas?

a)    Carbon dioxide gas

b)    Sulphur dioxide gas

c)     Methane

d)    All of the above

127]               Which of the following chemicals are used in a simple fire extinguisher?

a)    Na2CO3 and HCl

b)    NaHCO3 and H2SO4

c)     CaCO3 and HCl

d)    CaHCO3 and H2SO4

128]               Which type of glass is used in manufacture of electric bulbs?

a)    Water glass

b)    Hard glass

c)     Ordinary glass

d)    Flint glass

129]               Which of the followings is not an inert gas?

a)    Helium

b)    Krypton

c)     Neon

d)    None of the above

130]               Which of the following is not a green house gas?

a)    H2

b)    SO2

c)     CO2

d)    CH4

131]               Main three elements, which are used in the manufacture of chemical fertilizers, are ……..

a)    Nitrogen, Potassium and Phosphorus

b)    Nitrogen, Sodium and Calcium

c)     Iron, Calcium and Hydrogen

d)    Sodium, Sulphur and Carbon

132]               What is molecular formula of SINDOOR (Vermilion)?

a)    HgO

b)    HgS

c)     HgCl

d)    HgCl2

133]               Which of the following is known as super cooled liquid?

a)    Ice

b)    Dry ice

c)     Lead

d)    Glass

134]               Gunpowder (=Black powder = Barud) is a mixture of ………

a)    K2SO4 , S and C

b)    KClO3 , C and SO2

c)     KNO3 , S and C

d)    KMnO4 , SiO2 and S

135]               First organic compound, prepared in laboratory, is

a)    Formic acid

b)    Urea

c)     Amino acid

d)    Glucose

136]               The element, which is found in all organic compounds, is ……….

a)    Hydrogen

b)    Oxygen

c)     Carbon

d)    Calcium

137]               Light-year is a unit of …………..

a)    Time

b)    Intensity of light

c)     Distance

d)    Weight

138]               Parsec is a unit of ………..

a)    Distance

b)    Time

c)     Mass

d)    Speed

139]               What is the unit intensity of sound?

a)    Candela

b)    Decibel

c)     Watt/m2

d)    Coulomb

140]               Which is not a unit of distance?

a)    Light year

b)    Parsec

c)     Astronomical unit

d)    None of the above

141]               What is the unit of power of a lens?

a)    Watt

b)    Joule/second

c)     Horse power

d)    Diopter

142]               Decibel is a unit of ………

a)    Intensity of sound

b)    Pitch of sound

c)     Loudness of sound

d)    None of the above

143]               Which pair of physical quantities has same SI unit?

a)    Force and pressure

b)    Work and energy

c)     Mass and weight

d)    Electric charge and electric current

144]               One Astronomical Unit is the ………………

a)    Distance between the Sun and the Earth

b)    Distance between the Earth and the Moon

c)     Rotational period of the Earth on it’s own axis

d)    Revolutionary period of the Earth around the Sun

145]               Which one of the following is a fundamental SI unit?

a)    Kilogram

b)    Meter

c)     Kelvin

d)    All of the above

146]               If velocity of a moving body is doubled, it’s ………

a)    Potential energy is also doubled

b)    Potential energy is halved

c)     Kinetic energy is halved

d)    Kinetic energy is doubled

147]               Mass and Weight of a substance are two different physical quantities, because …………

a)    Mass remains unchanged while weight changes with change in height from the centre of the heavenly body.

b)    Mass changes with change in height from the centre of the heavenly body while weight does not change

c)     Weight increases with decrease in mass

d)    Weight decreases with increase in mass

148]               The rate of change in momentum of a body is directly proportional to the force applied on it. This is ………

a)    Newton’s universal law of gravitation

b)    Newton’s second law of motion

c)     Pascal’s law

d)    Archimedes’ principle

149]               We can swim in water. This is a case related to the Newton’s ……………

a)    First law of motion

b)    Second law of motion

c)     Third law of motion

d)    Universal law of gravitation

150]               According to the newton’s third law of motion, forces related to the Action and Reaction ………..

a)    Must be applied on the same object

b)    May be applied on the two different objects

c)     Must be applied on the two different objects

d)    Must be equal and in the same direction

151]               Force is defined from newton’s …………….

a)    First law of motion

b)    Second law of motion

c)     Third law of motion

d)    None of the above

152]               Unit Force is defined from Newton’s ……………

a)    First law of motion

b)    Second law of motion

c)     Third law of motion

d)    All of the above

153]               Newton’s first law of motion is also known as ……………

a)    Law of moment

b)    Law of flotation

c)     Law of inertia

d)    Universal law of gravitation

154]               The most abundant organic compound found in nature is …………

a)    Cellulose

b)    Glucose

c)     Fructose

d)    Sucrose

155]               H horse is pulling a cart and the cart is moving. Which force is acting there in moving the cart?

a)    The force applied by the cart to the horse

b)    The force applied by the horse to the cart

c)     The force applied by the feet of the horse to the earth

d)    The force applied by the earth to the feet of the horse and to the wheel of the cart

156]               Passengers, in a bus at rest, are pushed backward when the bus starts to move forward. This is due to …….

a)    Inertia of motion

b)    Inertia of rest

c)     Inertia of direction

d)    Force of gravity

157]               When an object is taken to the moon’s surface from the earth’s surface, it’s mass ………

a)    Decreases with increase in weight

b)    Increases with decrease in weight

c)     Decreases with decrease in weight

d)    Remains constant but weight decreases

158]               The value of acceleration due to gravity decreases, when we move on the surface of the earth from the ………

a)    Equator to the north pole

b)    Equator to the south pole

c)     North pole to the equator

d)    Poles to the equator

159]               What happens to the volume of the water? When it’s temperature falls from 10 0C to 2 0C.

a)    Decreases

b)    Increases

c)     First decreases and then increases

d)    First increases and then decreases

160]               When a solid iron ball is kept on the surface of the mercury in a beaker, it …….

a)    Sinks

b)    Floats inside the mercury

c)     Floats on the surface of the mercury

d)    Dissolves in the mercury

161]               What is the weight of the water displaced by a floating body?

a)    Less than the body

b)    Greater than the body

c)     Equal to the body

d)    Equal to the weight of the part of the body inside the water

162]               It is easier to swim in the sea and ocean than in a pond. Why?

a)    Mass of the water in the pond is less than the mass of the water in the ocean and sea.

b)    Density of the water in the sea and ocean is greater than the water in the pond.

c)     Density of the water in the sea and ocean is less than the water in the pond.

d)    None of the above.

163]               Gravitational force between any two bodies is …….

a)    Directly proportional to the product of their masses.

b)    Inversely proportional to the distance between them from centre to centre.

c)     Both of the above

d)    None of the above.

164]               A piece of ice floats in water, but sinks in alcohol. Why?

a)    Density of water is greater than the ice while density of the alcohol is smaller than the ice.

b)    Ice is a solid form of water.

c)     Ice is solid and alcohol is liquid.

d)    Water is more transparent than alcohol.

165]               When quantity (amount) of any substance is changed, which of the following does not change?

a)    Mass

b)    Weight

c)     Volume

d)    Density

166]               A piece of ice is floating in water. What part of the ice is above the surface of the water?


167]               Water boils below 100 0C at high mountains, why?

a)    Acceleration due to gravity decreases

b)    Atmospheric pressure increases

c)     Atmospheric pressure decreases

d)    Weight of water decreases

168]               Which of the following does not contain kinetic energy?

a)    Flowing water

b)    Stretched rubber

c)     Blowing air

d)    Fired bullet

169]               When a piece of stone is brought from the surface of the moon to the surface of the earth, which of the following is true?

a)    It’s volume increases

b)    It’s mass increases

c)     It’s weight increases

d)    All of the above

170]               A man, standing in a lift, feels heavier, when the lift ……….

a)    Moves upward with an acceleration

b)    Moves downward with an acceleration

c)     Moves with uniform velocity either upward or downward

d)    All of the above

171]               If force of gravity of the earth decreases to zero, then ………….

a)    Mass of an object on the earth’s surface also decreases to zero.

b)    Weight of the object decreases to zero.

c)     Mass and weight both of the object decreases to zero.

d)    No change in mass and weight of the object is zero.

172]               An artificial satellite is revolving around the earth. A ball is thrown vertically upward from the surface of the satellite. Where does the ball fall?

a)    Falls on the earth

b)    Falls on the moon

c)     Falls on the satellite

d)    Continues revolving around the earth like that satellite.

173]               A man is sitting in a moving bus. He throws a ball vertically upward. The ball falls ……….

a)    In the throwers hand

b)    In front of the man

c)     Behind the man

d)    Outside the bus

 

174]               An iron needle sinks in water, while a large ship, made up of iron, floats on the surface of the water. It is based on –

a)    Pascal’s law

b)    Newton’s law of motion

c)     Principle of floatation

d)    Newton’s universal law of gravitation

175]               A piece of ice is floating in water taken in a beaker. When the ice melts, what change will be seen in the weight of the water in that beaker?

a)    Weight increases

b)    Weight decreases

c)     Weight remains unchanged

d)    Weight increases first and then decreases to it’s initial weight

176]               Principle of floatation is related to ………….

a)    Pascal’s law

b)    Archimedes’ principle

c)     Newton’s law of motion

d)    Principle of a Hydraulic machine

177]               A beaker containing water is kept on a weighing which is showing 25 N. An object of weight 10 N is kept in the water and displaced water is allowed to flow out of the beaker. What change will be seen in the weight of the beaker with water and the object?

a)    Weight decreases below 25 N

b)    Weight increases to 40 N

c)     Weight increases first and then decreases to 25 N

d)    None of the above

178]               A piece of ice floating in water taken in a beaker. When the ice melts, what change will be seen in water level in the beaker?

a)    Water level increases

b)    Water level decreases

c)     Water level increases first and then decreases below it’s initial level

d)    Water level remains unchanged

179]               SI unit of power is watt. It is equivalent to …….

a)    Kgm2s-3

b)    Kgm2S-2

c)     Kgm/s2

d)    Kgm3s-3

180]               Joule (=J) is a SI unit of ………

a)    Force

b)    Power

c)     Acceleration

d)    Work

181]               A hydraulic brake works on …………..

a)    Archimedes’ principle

b)    Pascal’s law

c)     Principle of floatation

d)    Newton’s universal law of gravitation

182]               Newton-meter (Nm) is not a unit of ……..

a)    Potential energy

b)    Kinetic energy

c)     Work

d)    Force

183]               An object is taken from our earth’s surface to it’s centre. Which of the following is true?

a)    Weight of the object increases

b)    Weight of the object decreases to zero

c)     Weight and mass of the object remains unchanged.

d)    Mass changes without any change in it’s weight

 

184]               When an object is heated, what changes will be seen in it?

a)    Motion of the molecules of the object decreases

b)    Motion of the molecules of the object increases

c)     Temperature of the object increases

d)    Motion of the molecules of the object increases with increase in temperature of the object

185]               Average kinetic energy of the molecules of a substance is ………….

a)    Its temperature

b)    Its heat

c)     Its mass

d)    Its weight

186]               To measure the temperature of cold regions, alcohol is used as thermometric substances instead of mercury , because …….

a)    Density of alcohol is less than mercury

b)    Alcohol is cheaper than mercury

c)     Freezing temperature of alcohol is lowerer than mercury

d)    Alcohol is good conductor of heat

187]               Average human body temperature is ………

a)    98.6 0C

b)    37 0C

c)     310 K

d)    All of the above

188]               Water in a pound is freezing. What is the temperature of the water at the bottom of the pound?

a)    0 0C

b)    1 0C

c)     3 0C

d)    4 0C

189]               Steam of water hotter than boiling water, why?

a)    Because, steam is gaseous form of water.

b)    Because, steam has latent heat

c)     Because, steam has higher specific heat capacity than water

d)    None of the above

190]               Pitch of sound depends upon it’s ………….

a)    Frequency

b)    Intensity

c)     Velocity

d)    All of the above

191]               Frequency of audible sound is ………..

a)    20 KHz to 20,000 KHz

b)    20 Hz to 200 Hz

c)     20 Hz to 20 KHz

d)    2 KHz to 20 KHz

192]               Which one produces more sound pollution?

a)    Railway engine

b)    Moving car

c)     Radio

d)    Flying aeroplane

193]               Light is a kind of energy. It’s small particles are called …………….

a)    Electrons

b)    Proton

c)     Neutrons

d)    Photons

194]               Light wave is a ……………..

a)    Mechanical wave

b)    Transverse wave

c)     Longitudinal wave

d)    Mechanical and transverse wave

195]               Sunlight reaches from the sun to the earth in …………

a)    8 min 20 sec

b)    8 min 30 sec

c)     8 min 40 sec

d)    8 min 50 sec

196]               During solar Eclipse ………

a)    The earth lies between the sun and the moon

b)    The sun lies between the earth and the moon

c)     The moon lies between the earth and the sun

d)    The Sun, the Moon and the Earth lie at the vertices of an equilateral triangle

197]               Image of an object, formed at our retina, is ……….

a)    Inverted, real and smaller

b)    Inverted, virtual and smaller

c)     Erect, virtual and greater

d)    Erect, real and greater

198]               What is the power of a lens whose focal length is 25 cm?

a)    8 D

b)    7 D

c)     5 D

d)    4 D

199]               White light is composed of ………

a)    5 coloured visible rays

b)    7 coloured visible rays

c)     4 coloured visible rays

d)    6 coloured visible rays

200]               Which part of a human eye controls the amount of light which enter in the eye?

a)    Ciliary muscle

b)    Iris

c)     Retina

d)    Cornea

201]               A man can not see a distant object clearly. Which type of defect of vision is in his eyes?

a)    Myopia

b)    Hypermetropia

c)     Presbyopia

d)    None of the above

202]               Which of the following is the best conductor of electricity?

a)    Copper

b)    Aluminium

c)     Iron

d)    Silver

203]               When temperature of a conductor of electricity in increased, it’s ………

a)    Resistance does not change

b)    Resistance increases

c)     Resistance decreases

d)    Resistance decreases first and then increases

204]               Generally, electric wire is made up of copper, because ………..

a)    It is cheaper

b)    It is easily available

c)     It’s melting point is very high

d)    It’s resistance is low

205]               SI unit of electric current is ……………….

a)    Volt

b)    Ohm

c)     Ampere

d)    Kilowatt-hour

206]               Resistance of an electric wire depends upon …………

a)    Length of the wire

b)    Cross-sectional area of the wire

c)     Temperature of the wire

d)    All of the above

207]               A fuse wire of electricity is based on the …….

a)    Chemical effect of electricity

b)    Heating effect of electricity

c)     Magnetic effect of electricity

d)    All of the above

208]               Filament of an electric bulb is made up of ………..

a)    Aluminium

b)    Copper

c)     Tungsten

d)    Nichrome

209]               Element of a heater is made up of nichrome, because its …………………..

a)    Resistance is high

b)    It does not oxidise in air

c)     Both of the above

d)    None of the above

210]               An electric load of 100 w is used for 10 hours one day. How much energy is consumed by it per day?

a)    1 unit

b)    10 unit

c)     100 unit

d)    1000 unit

211]               Temperature of filament of a glowing electric bulb is nearly …………..

a)    3200 0C

b)    4200 0C

c)     5200 0C

d)    6200 0C

212]               Two bulbs of same power are connected to the same circuit having same physical conditions. One of them emits more light than the others. It means …………

a)    Resistance of the filament of the first bulb is smaller than the others.

b)    Resistance of the filament of the first bulb is greater than the others.

c)     Emitting of light from the filament does not depend upon its resistance.

d)    None of the above

213]               One unit electrical energy equals ………………..

a)    4 × 106 J

b)    4.6 × 106 J

c)     3.6 × 106 J

d)    3 × 106 J

214]               One volt (=1 V) potential difference equals ………..

a)    1 J

b)    1 N/J

c)     1 J/N

d)    1 J/C

[Here, J = Joule, C = Coulomb, N = Newton]

215]               A rough value for the internal resistance of the human body is …………….

a)    300 ohm to 1000 ohm

b)    1000 ohm to 1500 ohm

c)     1500 ohm to 1800 ohm

d)    2000 ohm


 

216]               At what is the sun releasing energy?

a)    3 × 1026 J/s

b)    3.8 × 1026 J/s

c)     4.8 × 1026 J/s

d)    6 × 1026 J/s

217]               Due to radiation of solar energy, the sun loses its mass at the rate of ……………

a)    3 × 109 Kg/s

b)    4 × 109 Kg/s

c)     5 × 109 Kg/s

d)    6 × 109 Kg/s

218]               Which of the following electrical device measures resistance of electricity?

a)    Ammeter

b)    Voltmeter

c)     Ohmmeter

d)    Lactometer

219]               Unit of magnetic flus is ……….

a)    Weber

b)    Coulomb

c)     Newton

d)    Gause

220]               Magnetic field is measured in ……….

a)    Coulomb

b)    Gause

c)     Weber

d)    Pascal

221]               Select non-magnetic substance from the followings.

a)    Iron

b)    Chromium

c)     Nickel

d)    Copper

222]               A magnet can be demagnetized by …………..

a)    Heating

b)    Striking with a hammer

c)     Both of the above

d)    None of the above

223]               The first man, who observed the magnetic effect of electric current, is ……….

a)    Hans Christian Oerested

b)    Faraday

c)     Henery Mosely

d)    Cavendish

224]               The magnetic effect of electricity is used in ……………..

a)    Electric bell

b)    Electric fan

c)     Electric washing machine

d)    All of the above

225]               The value of angle of dip at magnetic equator of the earth is …………

a)    900

b)    66.50

c)     23.50

d)    00

226]               Magnesium burns in …………….

a)    Oxygen gas

b)    Carbon dioxide gas

c)     Nitrogen gas

d)    All of the above

227]               Molecular formula of milk of magnesia is ……………..

a)    MgCO3

b)    Mg3N2

c)     Mg(OH)2

d)    MgSO4

228]               Molecular formula of rust is …………..

a)    Fe2O3.nH2O

b)    Fe3O4.nH2O

c)     FeO.nH2O

d)    Fe(OH)2

229]               Molecular formula of Fitkari is ……….

a)    KAl(SO4)2

b)    KClO3

c)     KNO3

d)    Mixture of KAl(SO4)2 , KClO3 and KNO3

230]               Molecular formula of Gypsum Salt is …….

a)    CaSO4.2H2O

b)    CuSO4.5H2O

c)     CaCO3

d)    None of the above

231]               To change Iron into Steel, which element is mixed with Iron?

a)    Sodium

b)    Potassium

c)     Carbon

d)    Silver

232]               Which element is added to steel to make it stainless steel?

a)    Sulphur

b)    Chromium

c)     Magnesium

d)    Silicon

233]               Who is known as Father of biology?

a)    Darwin

b)    Lemark

c)     Aristotle

d)    Newton

234]               Who is known as Father of physics?

a)    Sir Isaac Newton

b)    Antoine Lavoisier

c)     Charles’ Darwin

d)    Archimedes

235]               Who is known as Father of chemistry?

a)    Sir Isaac Newton

b)    Antoine Lavoisier

c)     Priestly

d)    John Dalton

236]               Who is Father of Genetics?

a)    Henery Cavendish

b)    Darwin

c)     Gregor Mendel

d)    Lemark

237]               Main air pollutant is ……..

a)    Carbon

b)    Carbon dioxide

c)     Argon

d)    Carbon monoxide

238]               Which of the following is main Green House Gas?

a)    CO

b)    CO2

c)     NH3

d)    O3

239]               Which set of gases is known as Green House Gases?

a)    CFCs , CO2 , CH4 , NO2

b)    CFCs , CO2 , NH3 , N2

c)     CO2 , CO , O2 , NH3

d)    O2 , N2 , CO2 , CO

240]               Ozone layer of atmosphere of the earth ……….

a)    Reduces the entrance of UV-rays from the sun.

b)    Increases the entrance of UV-rays from the sun.

c)     Neither increases nor decreases the entrance of UV-rays from the sun.

d)    Reduces the entrance of UV-rays during the night and increases during the days.

241]               Ultra-violet rays from the sun causes ……….

a)    Lung cancer

b)    Mouth cancer

c)     Skin cancer

d)    Blood cancer

242]               If water pollution continues at the present rate, which of the following effect will be see?

a)    Water cycle will be stoped.

b)    Atmospheric temperature decreases

c)     Insufficient oxygen will be available to aquatic organisms.

d)    Sufficient oxygen will be available to aquatic organisms

243]               The halogen, which is used as pain-killer, is …………..

a)    Fluorine

b)    Chlorine

c)     Bromine

d)    Iodine

244]               Which of the followings is not an inert gas?

a)    Helium

b)    Neon

c)     Xenon

d)    None of the above

245]               Which of the following is not a Green House Gas?

a)    CO2

b)    N2O

c)     CH4

d)    None of the above

246]               Quartz is a crystalline form of …………

a)    Silica

b)    Limestone

c)     Plastic

d)    Cement

247]               Which of the following is a mineral acid?

a)    HCOOH

b)    H2CO3

c)     CH3COOH

d)    C6H5OH

248]               Which halogen is used to purify drinking water?

a)    Fluorine

b)    Chlorine

c)     Bromine

d)    Iodine

249]               The acid, which is introduced in our skin by stinging of honey bees and ants, is …………

a)    C6H5OH

b)    H2CO3

c)     CH3COOH

d)    HCOOH

250]               Which of the following gas is combustible?

a)    Hydrogen

b)    Ethane

c)     Butane

d)    All of the above

251]               The gas, which gives Alkali when dissolved in water, is ………….

a)    Ammonia

b)    Carbon dioxide

c)     Both of the above

d)    None of the above

252]               Which of the following is not a form of coal?

a)    Limestone

b)    Bituminous

c)     Anthracite

d)    Lignite

253]               The gas, when passed through lime-water, changes the lime water into milky-white, is ………….

a)    NH3

b)    CO

c)     CO2

d)    CH4

254]               ‘Drikod’ is solid form of ……….

a)    H2O

b)    O2

c)     N2

d)    CO2

255]               General formula of Unsaturated hydro-carbon is ……………

a)    CnH2n+2

b)    CnH2n

c)     CnH2n-2

d)    Both CnH2n and CnH2n-2

256]               The process of changing a solid into its liquid is called ………..

a)    Freezing

b)    Melting

c)     Boiling

d)    Distillation

257]               The process of changing a liquid into its gaseous form is called ………

a)    Vaporization

b)    Condensation

c)     Distillation

d)    Sublimation

258]               The process of changing a solid into its gaseous form without changing into its liquid form and again converting the gas into its solid form of same thing at same time is called ………..

a)    Vaporization

b)    Condensation

c)     Distillation

d)    Sublimation


 

 

259]               The process of changing a liquid into its solid form is called …………

a)    Condensation

b)    Melting

c)     Freezing

d)    Boiling

260]               The process of changing a gas into its liquid form is called ………..

a)    Condensation

b)    Melting

c)     Freezing

d)    Solidification

261]               The combined process of vaporization and condensation at the same time is called ………..

a)    Vaporization

b)    Distillation

c)     Sublimation

d)    Crystallization

262]               Which of the following is known as liquid-Gold?

a)    Alcohol

b)    Milk

c)     Aquaregia

d)    Petroleum

263]               Tincture iodine is ……..

a)    Solution of Iodine in alcohol

b)    Solution of Iodine in water

c)     Solution of Iodine in petrol

d)    Liquid form of Iodine

264]               Lead crystal glass is also called ………

a)    Optical glass

b)    Flint glass

c)     Potash lead glass

d)    All of the above

265]               Alkanes are called paraffins due to its low reactivity, while alkenes are more reactive than alkanes and are called ………

a)    Formalin

b)    Adenosine

c)     Lactogenes

d)    Olefins

266]               What is the molecular formula of chloroform?

a)    CHCl3

b)    CH2Cl2

c)     CH3Cl

d)    CCl4

267]               Which one is a mineral oil?

a)    Gasoline

b)    Diesel

c)     Kerosene

d)    All of the above

268]               A voltmeter measures ………….

a)    Electric current

b)    Potential difference

c)     Resistance

d)    Electrical energy consumed


 

Answer of Multiple Choice Questions Set D

1

d

41

d

81

a

121

a

161

c

201

a

241

c

2

c

42

d

82

a

122

a

162

b

202

d

242

c

3

a

43

c

83

a

123

d

163

c

203

b

243

d

4

b

44

d

84

c

124

a

164

a

204

d

244

d

5

c

45

a

85

b

125

d

165

d

205

c

245

d

6

b

46

c

86

b

126

d

166

b

206

d

246

a

7

a

47

b

87

c

127

b

167

c

207

b

247

b

8

c

48

d

88

c

128

d

168

b

208

c

248

b

9

a

49

d

89

b

129

d

169

c

209

c

249

d

10

a

50

c

90

c

130

a

170

a

210

a

250

d

11

d

51

a

91

a

131

a

171

b

211

a

251

a

12

d

52

d

92

c

132

b

172

d

212

b

252

a

13

b

53

d

93

c

133

d

173

a

213

c

253

c

14

c

54

c

94

c

134

c

174

c

214

d

254

d

15

c

55

b

95

s

135

b

175

c

215

a

255

d

16

a

56

a

96

s

136

c

176

b

216

b

256

b

17

a

57

a

97

s

137

c

177

c

217

d

257

a

18

d

58

b

98

c

138

a

178

d

218

c

258

d

19

c

59

d

99

c

139

c

179

a

219

a

259

c

20

c

60

c

100

a

140

d

180

d

220

b

260

a

21

b

61

d

101

b

141

d

181

b

221

d

261

b

22

b

62

d

102

c

142

c

182

d

222

c

262

d

23

b

63

c

103

d

143

b

183

b

223

a

263

a

24

c

64

b

104

a

144

a

184

d

224

d

264

d

25

a

65

a

105

b

145

d

185

a

225

d

265

d

26

b

66

d

106

a

146

d

186

c

226

d

266

a

27

c

67

c

107

a

147

a

187

d

227

c

267

d

28

d

68

b

108

d

148

b

188

d

228

a

268

b

29

b

69

a

109

b

149

c

189

b

229

a

 

 

30

d

70

c

110

b

150

b

190

a

230

a

 

 

31

a

71

a

111

c

151

a

191

c

231

c

 

 

32

b

72

b

112

c

152

b

192

d

232

b

 

 

33

a

73

b

113

d

153

c

193

d

233

c

 

 

34

a

74

a

114

d

154

a

194

b

234

a

 

 

35

d

75

d

115

c

155

d

195

a

235

b

 

 

36

d

76

c

116

b

156

b

196

c

236

c

 

 

37

d

77

d

117

b

157

d

197

a

237

d

 

 

38

a

78

b

118

c

158

d

198

d

238

b

 

 

39

c

79

d

119

b

159

c

199

b

239

a

 

 

40

b

80

c

120

a

160

c

200

b

240

a

 

 

 

 


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