.

Union Public Service Commission

Civil Services Preliminary Examination

General Science Questions Asked In Previous Years’ Exams

Directions : The following questions consists of two statements : one

labelled as the ‘Assertion (A)’ and the other as ‘Reason (R)’. You are

to examine these two statements carefully and select the answers to

these questions using the codes given below :

(a) Both A and R are individually

true and R is the correct

explanation of A

(b) Both A and R are individually

true but R is not the correct

explanation of A

(c) A is true but R is false

(d) A is false but R is true

7. Assertion (A) :

In our houses, the current in

AC electricity line changes

direction 60 times per second.

Reason (R) :

The frequency of alternating

voltage supplied is 60 hertz.

(CSE 2004)

8. Assertion (A) :

Fatty acids should be a part

of the balanced human diet.

Reason (R) :

The cells of the human body

cannot synthesize any fatty

acids.

(CSE 2004)

9. Which of the following pairs is not

correctly matched ?

(a) Reinhold : Computer

Messner Technology

(b) Harlow Shapley : Astronomy

Theory

(d) Godfrey Hounsfield : CT Scan

(CSE 2004)

10. A car is running on a road at a

uniform speed of 60 km/hr. The net

resultant force on the car is

(a) Driving force in the direction of

car’s motion

(b) Resistance force opposite to the

direction of car’s motion

(d) Equal to zero

(CSE 2004)

11. The research work of Paul

Lauterbur and Peter Mansfield, the

Nobel Prize winners for Medicine in

2003, relates to

(a) The control of AIDS

(b) Magnetic resonance imaging

(d) Genetic engineering

(CSE 2004)

12. Match List I (Fuel Gases) with

List II (Major Constituents) and select

the correct answer using the codes given

below the Lists :

List I List II

(Fuel Gases) (Major Constituents)

A. CNG 1. Carbon monoxide,

Hydrogen

B. Coal gas 2. Butane, Propane

C. LPG 3. Methane, Ethane

D. Water gas 4. Hydrogen,

Methane, Carbon

monoxide

Codes :

A B C D

(a) 2 1 3 4

(b) 3 4 2 1

(d) 3 1 2 4

(CSE 2004)

13. A spherical body moves with

a uniform angular velocity ù around

a circular path of radius r. Which one of

the following statements is correct ?

(a) The body has no acceleration

(b) The body has a radial acceleration

ù2r directed towards the centre of

the path

2/5ù2r directed away from the

centre of the path

(d) The body has an acceleration ù2r

tangential to its path

(CSE 2004)

14. A weightless rubber balloon is

filled with 200 cc of water. Its weight in

water is equal to

(a) N

8 . 9

(b) N

8 . 9

(d) Zero

(CSE 2004)

Salts of which of the following

elements provide colours to fireworks ?

(a) Zinc and sulphur

(b) Potassium and mercury

(d) Chromium and nickel

(CSE 2004)

16. Consider the following statements :

1. Femur is the longest bone in the

human body.

2. Cholera is a disease caused by

bacteria.

3. ‘Athlete’s foot’ is a disease caused

by virus.

Which of the statements given above

are correct ?

(a) 1 and 2 (b) 2 and 3

(CSE 2004)

17. Consider the following statements :

1. Smart Card is a plastic card with

an embedded microchip.

2. Digital technology is primarily used

with new physical communication

medium such as satellite and fibre

optics transmission.

3. A digital library is a collection of

documents in an organised

electronic form available on the

Internet only.

Which of the statements given above

is/are correct ?

(a) 3 only (b) 1 and 2

(CSE 2004)

18. With reference to ionic compounds,

consider the following statements :

1. Ionic compounds are insoluble in

alcohol.

2. Ionic compounds in the solid state

are good conductors of electricity.

Which of these statements is/are

correct ?

(a) Only 1 (b) Only 2

(CSE 2003)

19. Which of the following statements

is not correct ?

(a) The presence of NaCl increases the

rate of setting of Plaster of Paris

(b) Gypsum is added to the cement

to slow down its rate of setting

hydrated salts

(d) Barium and Strontium are found

free in nature

(CSE 2003)

20. Octopus is

(a) An arthropod (b) An echinoderm

(CSE 2003)

21. Consider the following conditions

of a sick human body :

1. Swollen lymph nodes

2. Sweating at night

3. Loss of memory

4. Loss of weight

Which of these are the symptoms of

AIDS ?

(a) 1 and 2 (b) 2, 3 and 4

(CSE 2003)

22. Regarding the atom of a chemical

element, the magnetic quantum number

refers to

(a) Orientation (b) Shape

(CSE 2003)

23. Consider the following statements :

1. The common blue green algae

Spirogyra and Ulothrix are found in both

fresh water ponds and oceans.

2. The chameleon can look ahead with

one eye, and at the same time look

behind with another.

Which of these statements is/are

correct ?

(a) Only 1 (b) Only 2

(CSE 2003)

Directions : The following items

consist of two statements : one labelled

as the ‘Assertion (A)’ and the other as

‘Reason (R)’. You are to examine these

two statements carefully and select

the answers to these items using the

codes given below :

(a) Both A and R are individually

true and R is the correct

explanation of A

(b) Both A and R are individually

true but R is not the correct

explanation of A

(c) A is true but R is false

(d) A is false but R is true

24. Assertion (A) :

In the periodic table of

chemical elements, electron

affinity is always found to

increase from top to bottom

in a group.

Reason (R) :

In a group, the atomic radii

generally increase from top to

bottom.

(CSE 2003)

25. Assertion (A) :

Coal-based thermal power

stations contribute to acidrain.

Reason (R) :

Oxides of carbon are emitted

when coal burns.

(CSE 2003)

26. Assertion (A) :

Unsaturated fats are more

reactive compared with the

saturated fats.

Reason (R) :

Unsaturated fats have only

single bonds in their structure.

(CSE 2003)

27. If the radius of the earth were to

shrink by one percent, its mass remaining

the same, the value of ‘g’ on the earth’s

surface would

(a) Increase by 0.5%

(b) Increase by 2%

(d) Decrease by 2%

(CSE 2003)

28. With reference to the work of

human kidney, consider the following

statements :

1. After the waste is removed in the

kidney, the cleaner blood is sent back

through renal artery.

2. From Bowman’s capsule, the

filtered liquid passes through tiny tubes

where much of the glucose is reabsorbed

and sent back to the blood in the renal

vein.

Which of these statements is/are

correct ?

(a) Only 1 (b) Only 2

(CSE 2003)

29. A hydrogen-inflated polythene

balloon is released from the surface of

the earth. As the balloon rises to an

altitude up in the atmosphere, it will

(a) Decrease in size

(b) Flatten into a disc-like shape

(d) Maintain the same size and shape

(CSE 2003)

30. Consider the following statements:

1. Steam at 100°C and boiling water

at 100°C contain same amount of heat.

2. Latent heat of fusion of ice is equal

to the latent heat of vaporisation of water.

3. In an air-conditioner, heat is

extracted from the room-air at the

evaporator coils and is rejected out at

the condenser coils.

Which of these statements is/are

correct ?

(a) 1 and 2 (b) 2 and 3

(CSE 2003)

31. Consider the following statements:

1. Molasses is a by-product of sugar

production process.

2. Bagasse obtained in the sugar mills

is used as a fuel in the boilers to

generate steam for the sugar

factories.

3. Sugar can only be produced from

sugarcane as the raw material.

Which of these statements are

correct ?

(a) 1 and 2 (b) 2 and 3

(CSE 2003)

32. Consider the following statements:

A 4-wheel vehicle moving in a sharp

circular path at high speed will

1. Overturn about its outer wheels.

2. Overturn about its inner wheels.

3. Skid outwards.

4. Skid inwards.

Which of these statements are correct ?

(a) 1 and 3 (b) 2 and 4

(CSE 2003)

33. Which one of the following

statements is correct ?

(a) Liquid Sodium is employed as a

coolant in nuclear reactors

(b) Calcium carbonate is an ingredient

of tooth paste

Sodium sulphate and lime

(d) Zinc amalgams are used as a dental

filling

(CSE 2003)

34. Diffusion of light in the

atmosphere takes place due to

(a) Carbon dioxide (b) Dust particles

(CSE 2003)

35. An oil tanker is partially filled with

oil and moves forward on a level road

with uniform acceleration. The free

surface of oil then

(a) remains horizontal

(b) is inclined to the horizontal with

smaller depth at the rear end

larger depth at the rear end

(d) assumes parabolic curve

(CSE 2003)

36. Consider the following statements:

The purpose of adding sodium

sulphate and sodium silicate to the

detergent in a washing powder is

1. To keep the washing powder dry.

2. To maintain the alkalinity of the

powder.

Which of these statements is/are

correct ?

(a) Only 1 (b) Only 2

(CSE 2003)

37. Which one of the following

statements is not correct ?

(a) Milk contains none of the

B-vitamins

(b) Vitamin-A (retinol) deficiency leads

to dry and scaly skin

is pain in the joints

(d) Vitamin-B1 (thiamine) deficiency

can lead to heart failure

(CSE 2003)

38. Which one of the following

statements is not correct ?

(a) The velocity of sound in air

increases with the increase of

temperature

(b) The velocity of sound in air is

independent of pressure

decreases as the humidity increases

(d) The velocity of sound in air is not

affected by the change in amplitude

and frequency

(CSE 2003)

39. Which one of the following is

produced during the formation of

photochemical smog ?

(a) Hydrocarbons (b) Nitrogen Oxides

(CSE 2003)

40. With reference to normal human

beings, consider the following statements :

1. In response to the presence of

HCl, secretin is produced from the

duodenum.

2. Enterogastrone is produced in the

small intestine in response to the

presence of fatty acids.

Which of these statements is/are

correct ?

(a) Only 1 (b) Only 2

(CSE 2003)

41. Which one of the following

statements is not correct ?

(a) All echinoderms are viviparous

(b) Roundworm has no circulatory

system

usually present

(d) In cartilaginous fishes, fertilisation

is internal

(CSE 2002)

42. Match List I (Scientists) with

List II (Achievements) to select the

correct answer using the codes given

below the lists :

List I List II

(Scientists) (Achievements)

A. Arber and 1. Developed trans-

Smith genic plants with

Agrobacterium

T-DNA

B. Feldman 2. Discovered

endonucleases

C. Mullis 3. Discovered

reverse

transcriptase

D. Temin and 4. Discovered poly-

Baltimore merase chain

reaction

A B C D

(a)2 1 4 3

(b)1 2 4 3

(d)1 2 3 4

(CSE 2002)

43. Which one of the following

statements is correct ?

(a) Prions are the smallest free-living

cells

(b) The cell wall of Mycoplasmas is

made up of amino sugars

RNA molecule

(d) Rickettsias lack cell wall

(CSE 2002)

Directions : The following items

consist of two statements, one labelled

as the "Assertion A" and the other as

"Reason R". You are to examine these

two statements carefully and decide if

the "Assertion A" and the "Reason

R" are individually true and if so,

whether the "Reason R" is the correct

explanation for the given "Assertion

A". Select your answers to these items

using the codes given below :

(a) Both A and R are individually

true and R is the correct

explanation of A

(b) Both A and R are individually

true but R is not the correct

explanation of A

(c) A is true but R is false

(d) A is false but R is true

44. Assertion (A) : Drinking of

whisky increases the frequency of

urination.

Reason (R) : Alcohol intake

speeds up the secretion of

vasopressin in the body.

(CSE 2002)

45. Assertion (A) : With the

increase of temperature, the

viscosity of glycerine increases.

Reason (R) : Rise of temperature

increases kinetic energy of the

molecules.

(CSE 2002)

46. Assertion (A) : Synthetic detergents

can lather well in hard water.

Reason (R) : Synthetic detergents

form soluble calcium and

magnesium salts with hard water.

(CSE 2002)

47. Assertion (A) : Artificial

satellites are always launched from

the earth in the eastward direction.

Reason (R) : The earth rotates

from west to east and so the

satellite attains the escape velocity.

(CSE 2002)

48. Assertion (A) : Human diet

should compulsorily contain

Glycine, Serine and Tyrosine.

Reason (R) : Essential amino

acids cannot be synthesised in the

human body.

(CSE 2002)

49. Assertion (A) : An iron ball

floats on mercury but gets

immersed in water.

Reason (R) : The specific gravity

of iron is more than that of

mercury.

(CSE 2002)

50. With reference to the latest

developments in stem cell research,

consider the following statements :

1. The only source of human stem

cells are the embryos at blastocyst

stage

2. The stem cells can be derived

without causing destruction to

blastocysts.

3. The stem cells can regenerate

themselves in vitro, virtually

forever.

4. Indian research centres also

created a few cell lines which can

be developed into many types of

tissues.

Which of these statements are correct ?

(a) 1, 2, 3 and 4 (b) 1, 2 and 3

(CSE 2002)

51. Among living organisms, which

one of the following is the most

responsible factor for bringing about the

origin of a new species ?

(a) Isolation

(b) Mutation

(d) Sexual Reproduction

(CSE 2002)

52. Ticks and mites are actually

(a) Arachnids (b) Crustaceans

(CSE 2002)

53. With reference to the blood in a

normal person, which one of the

following statements is correct ?

(a) Compared to arteries, veins are less

numerous and hold less of the

body's blood at any given time

(b) Blood cells constitute about 70

percent of the total volume of

the blood

made by lymph nodes only

(d) The blood has more platelets than

WBC

(CSE 2002)

54. Which one of the following

statements is correct with reference to

our solar system ?

(a) The Earth is the densest of all

the planets in our solar system

(b) The predominant element in

the composition of the Earth is

silicon

the mass of the solar system

(d) The diameter of the Sun is 190

times that of the Earth

(CSE 2002)

55. Which one of the following

statements is not correct ?

(a) The boiling point of an aqueous

solution is higher than that of pure

water

(b) Addition of solutes to a solution

causes an increase in its water

potential

in a solution is lower than that of

pure water

(d) When a solution is separated from

water by a semi-permeable

membrane, water movement can

be prevented by applying pressure

to the solution

(CSE 2002)

56. Consider the following plants :

1. Bougainvillaea 2. Carnations

3. Cocoa 4. Grapes

Which of these plants are propagated

by stem cuttings ?

(a) 1 and 2 (b) 2, 3 and 4

(CSE 2002)

57. Consider the following natural

phenomena :

1. Terrestrial heating

2. Reflection of light

3. Refraction of light

4. Diffraction of light

Due to which of these phenomena is

mirage formed ?

(a) 1 and 2 (b) 2, 3 and 4

(CSE 2002)

58. In the context of organic

evolution, the loss of limbs of snakes is

explained by the phenomenon of

(a) Use and disuse of organs

(b) Adaptation to living in burrows

(d) Inheritance of acquired characters

(CSE 2002)

59. Match List I (Oxidation numbers)

with List II (The elements) to select the

correct answer using the codes given

below the lists:

List I List II

(Oxidation (The elements)

numbers)

A. 2 1. Oxidation number

of Mn in MnO2

B. 3 2. Oxidation number

of S in H2S2O7

C. 4 3. Oxidation

number of Ca in

CaO

D. 6 4. Oxidation

number of Al in

NaAlH4

A B C D

(a)3 4 1 2

(b)4 3 1 2

(d)4 3 2 1

(CSE 2002)

60. Foot-and-Mouth disease in

animals, a current epidemic in some parts

of the world, is caused by

(a) Bacterium (b) Fungus

(CSE 2002)

61. When one gene controls two or

more different characters simultaneously,

the phenomenon is called

(a) Apomixis (b) Pleiotropy

(CSE 2002)

62. With reference to the human body,

consider the following statements:

1. The production of somatotropin

goes up when a person exercises.

2. Men's testes produce progesterone.

3. Women's adrenal glands secrete

testosterone.

4. Stress causes the adrenals to

release very less amount of

cortisol than usual.

Which of these statements are correct ?

(a) 1, 2, 3 and 4 (b) 1, 2 and 3

(CSE 2002)

63. Consider the following statements:

1. Light of longer wavelength is

scattered much more than the light

of shorter wavelength.

2. The speed of visible light in water

is 0.95 times the speed in vacuum.

3. Radio waves are produced by rapidly

oscillating electrical currents.

4. To detect the overspeeding vehicles,

police use the Doppler effect of

reflected short radio waves.

Which of these statements are

correct ?

(a) 1 and 2 (2) 1 and 3

(CSE 2002)

64. Which one of the following is

monogamous ?

(a) Wolf (b) Walrus

(CSE 2002)

65. Which one of the following is the

correct sequence in increasing order of

molecular weights of the hydrocarbons ?

(a) Methane, ethane, propane and

butane

(b) Propane, butane, ethane and

methane

(d) Butane, propane, ethane and

methane

(CSE 2001)

66. Which organelle in the Cell, other

than nucleus, contains DNA ?

(a) Centriole (b) Golgi apparatus

(CSE 2001)

67. Match List I with List II and select

the correct answer using the codes given

below the Lists :

List I List II

(Achievement (Scientists)

in Genetics)

A. Discovery of 1. Khurana

transduction

and conjugation

in bacteria

B. Establishing 2. Kornberg

the sex-linked

inheritance

C. Isolation of 3. Lederberg

DNA polymerase

from E. Coli

D. Establishing the 4. Morgan

complete genetic

code

5. Ochoa

A B C D

(a) 4 3 2 1

(b) 3 4 1 5

(d) 3 4 2 1

(CSE 2001)

68. "Athlete’s Foot" is a disease caused

(a) Bacteria (b) Fungus

(CSE 2001)

69. In the eye donation, which part of

the eye is transplanted from the donor ?

(a) Cornea (b) Lens

(CSE 2001)

70. A man whose blood group is not

known meets with a serious accident and

needs blood transfusion immediately.

Which one of the blood groups mentioned

below and readily available in the hospital

will be safe for transfusion ?

(a) O, Rh– (b) O, Rh+

(CSE 2001)

71. Cloudy nights are warmer as

compared to clear cloudless nights,

because clouds

(a) Prevent cold waves from the sky

from descending on earth

(b) Reflect back the heat given off by

earth

(d) Absorb heat from the atmosphere

and send it towards earth

(CSE 2001)

72. "Metastasis" is the process by which

(a) Cells divide rapidly under the

influence of drugs

(b) Cancer cells spread through the

blood or lymphatic system to other

sites or organs

attached to the spindle before

moving to the anaphase poles

(d) Cancer cells are successfully

inhibited to divide any further

(CSE 2001)

73. Who is the scientist in whose

honour the "Chandra" X-ray telescope

has been named ?

(a) Chandrasekhar Venkat Raman

(b) Jagdish Chandra Bose

(d) Subrahmanyan Chandrasekhar

(CSE 2001)

74. The mass of a body on earth is

100 kg (acceleration due to gravity,

ge = 10 m/s2). If acceleration due to

gravity on the moon is ,

.. .

then the

mass of the body on the moon is

(a) kg

100

(b) 60 kg

(CSE 2001)

75. In an atom, the order of filling up

of the orbitals is governed by

(a) Aufbau principle

(b) Heisenberg’s uncertainty principle

(d) Pauli’s exclusion principle

(CSE 2001)

76. An aqueous solution of copper

sulphate is acidic in nature because the

salt undergoes

(a) Dialysis (b) Electrolysis

(CSE 2001)

77. Consider the following statements :

A simple pendulum is set into

oscillation. Then

1. The acceleration is zero when the

bob passes through the mean

position.

2. In each cycle the bob attains a

given velocity twice.

3. Both acceleration and velocity of

the bob are zero when it reaches

its extreme position during its

oscillation.

4. The amplitude of oscillation of the

simple pendulum decreases with

time.

Which of these statements are correct

(a) 1 and 2 (b) 3 and 4

(CSE 2001)

78. Consider the following statements

with reference to the Periodic Table of

chemical elements :

1. Ionisation potential gradually

decreases along a period.

2. In a group of elements, electron

affinity decreases as the atomic

weight increases.

3. In a given period, electronegativity

decreases as the atomic number

increases.

Which of these statement(s) is/are

correct ?

(a) 1 only (b) 2 only

(CSE 2001)

79. Match List I with List II and select

the correct answer using the codes given

below the Lists :

List I List II

(Substances) (Physiological role)

A. Ptyalin 1. Converts

angiotensinogen

in blood into

angiotensin

B. Pepsin 2. Digests starch

C. Renin 3. Digests proteins

D. Ocytocin 4. Hydrolyses fats

5. Induces contraction

of smooth muscles

A B C D

(a) 2 3 1 5

(b) 3 4 2 5

(d) 3 1 2 4

(CSE 2001)

80. Epiphytes are plants which depend

on other plants for

(a) Food (b) Mechanical support

(CSE 2001)

81. Antigen is a substance which

(a) Destroys harmful bacteria

(b) Is used to treat poisoning

(d) Stimulates formation of antibody

(CSE 2001)

82. Which of the following features

of DNA makes it uniquely suited to

store and transmit genetic information

from generation to generation ?

(a) Complementarity of the two

strands

(b) Double helix

(d) Sugar-phosphate backbone

(CSE 2001)

83. Two wires have their lengths,

diameters and resistivities, all in the ratio

of 1 : 2. If the resistance of the thinner

wire is 10 ohms, then the resistance of

the thicker wire is

(a) 5 ohms (b) 10 ohms

(CSE 2001)

84. Which of the following cell

organelles play the most significant role

in protein synthesis ?

(a) Lysosome and Centrosome

(b) Endoplasmic Reticulum and

Ribosome

(d) Lysosome and Mitochondria

(CSE 2001)

Directions : The following questions

consist of two statements, one labelled

as the ‘Assertion A’ and the other

labelled as the ‘Reason R’. You are to

examine these two statements

carefully and decide if the ‘Assertion

A’ and the ‘Reason R’ are individually

true and if so, whether the ‘Reason R’

is the correct explanation for the

‘Assertion A’. Select your answer to

each of these questions using the

codes given below.

(a) Both A and R are individually

true and R is the correct

explanation of A.

(b)Both A and R are individually

true but R is not a correct

explanation of A.

(c) A is true but R is false.

(d)A is false but R is true.

85. Assertion (A) : A piece of copper

and a piece of glass are heated to

the same temperature. When

touched, thereafter, the copper piece

appears hotter than the glass piece.

Reason (R) : The density of

copper is more than that of glass.

(CSE 2001)

86. Assertion (A) : A chemical

reaction becomes faster at higher

temperatures.

Reason (R) : At higher

temperatures, molecular motion

becomes more rapid.

(CSE 2001)

87. Assertion (A) : The boiling point

of water decreases as the altitude

increases.

Reason (R) : The atmospheric

pressure increases with altitude.

(CSE 2001)

88. Assertion (A) : Scientists can cut

apart and paste together DNA

molecules at will, regardless of the

source of the molecules.

Reason (R) : DNA fragments can

be manipulated using restriction

endonucleases and DNA ligases.

(CSE 2001)

89. Which one of the following is not

radioactive ?

(a) Astatine (b) Francium

(CSE 2001)

90. The American multinational

company, Monsanto, has produced an

insect-resistant cotton variety that is

undergoing field-trials in India. A toxin

gene from which one of the following

bacteria has been transferred to this

transgenic cotton ?

(a) Bacillus subtilis

(b) Bacillus thurigiensis

(d) Bacillus globlii

(CSE 2001)

91. When lightwaves pass from air to

glass, the varibles affected are

(a) Wavelength, frequency and velocity

(b) Velocity and frequency

(d) Wavelength and velocity

(CSE 2001)

92. When water is heated from 0°C

to 10°C, its volume

(a) Increases (b) Decreases

(d) First decreases and then increases

(CSE 2001)

93. The cellular and molecular control

of programmed cell death is known as

(a) Apoptosis (b) Ageing

(CSE 2001)

94. Consider the following statements :

In a nuclear reactor, self-sustained

chain reaction is possible, because

1. More neutrons are released in

each of the fission reactions.

2. The neutrons immediately take

part in the fission process.

3. The fast neutrons are slowed

down by Graphite.

4. Every neutron released in the

fission reaction initiates further

fission.

Which of these statements are correct ?

(a) 1, 2 and 3 (b) 1 and 3

(CSE 2001)

95. Match List I with List II and select

the correct answer using the codes given

below the Lists :

List I (Bones) List II (Names)

A. Breast-bone 1. Clavicle

B. Collar-bone 2. Patella

C. Knee-cap 3. Scapula

D. Shoulder blade 4. Sternum

A B C D

(a) 4 1 3 2

(b) 1 4 3 2

(d) 4 1 2 3

(CSE 2001)

96. Consider the following statements :

1. Tapeworm is a hermaphrodite.

2. Round-worm has separate sexes.

3. Filaria is caused by a nematode.

4. Guinea-worm is an annelid.

Which of these are correct ?

(a) 1 and 2 (b) 1, 2 and 3

(CSE 2001)

97. The ‘stones’ formed in human

kidney consist mostly of

(a) Calcium oxalate

(b) Sodium acetate

(d) Calcium

(CSE 2000)

98. Most of the explosions in mines

occur due to the mixing of

(a) Hydrogen with oxygen

(b) Oxygen with acetylene

(d) Carbon dioxide with ethane

(CSE 2000)

99. Which one of the following

organisms can serve as a biofertilizer for

rice crop ?

(a) Blue-green algae (b)Rhizobium sp

(CSE 2000)

100. At which stage in its life cycle

does the silk worm yield the fibre of

commerce ?

(a) Egg (b) Larva

(CSE 2000)

101. The blood glucose level is

commonly expressed as

(a) Millimeter of Hg

(b) Milligram per decilitre

(d) Grammes per litre

(CSE 2000)

102. Phytotron is a facility to

(a) Grow plants under disease-free

conditions

(b) Conserve endangered species of

the plants

conditions

(d) Induce mutations

(CSE 2000)

103. Which one of the following

materials is very hard and very ductile ?

(a) Carborundum (b) Tungsten

(CSE 2000)

104. Insect-resistant cotton plants have

been genetically engineered by inserting

a gene from a/an

(a) Virus (b) Bacterium

(CSE 2000)

105. Soft drinks such as colas contain

significant quantities of

(a) Caffeine (b) Nicotine

(CSE 2000)

106. Which one of the following does

a TV remote control unit use to operate

a TV set ?

(a) Light waves (b) Sound waves

(CSE 2000)

107. Hybridoma technology is a

new biotechnological approach for

commercial production of

(a) Monoclonal antibodies

(b) Interferon (c) Antibiotics

(d) Alcohol

(CSE 2000)

108. The sensation of fatigue in the

muscles after prolonged strenuous

physical work is caused by

(a) A decrease in the supply of oxygen

(b) Minor wear and tear of muscle

fibres

(d) The accumulation of lactic acid

(CSE 2000)

109. Aluminium surfaces are often

‘anodized’. This means the deposition of

a layer of

(a) Chromium oxide

(b) Aluminium oxide

(d) Zinc oxide

(CSE 2000)

110. Consider the following statements :

Hard water is not suitable for

1. Drinking

2. Washing clothes with soap

3. Use in boilers

4. Irrigating crops

Which of these statements are

correct ?

(a) 1 and 3 (b) 2 and 3

(CSE 2000)

111. A small pouch containing silica gel

is often found in bottles of medicine in

tablet or powder form because silica gel

(a) Kills bacteria

(b) Kills germs and spores

(d) Absorbs all gases present inside the

bottle

(CSE 2000)

112. Canola refers to special type of

oil seed mustard varieties bred for human

consumption. The main characteristic of

these varieties is that the

(a) Seeds have very high oil content

(b) Oil is rich in unsaturated fatty acids

(d) Oil has very low Erucic acid content

(CSE 2000)

113. A noise level of 100 decibels

would correspond to

(a) Just audible sound

(b) Ordinary conversation

(d) Noise from a machine-shop

(CSE 2000)

114. A ‘black hole’ is a body in space

which does not allow any radiation to

come out. This property is due to its

(a) Very small size

(b) Very large size

(d) Very low density

(CSE 2000)

115. The memory of a computer is

commonly expressed in terms of kilobytes

or megabytes. A byte is made up of

(a) Eight binary digits

(b) Eight decimal digits

(d) Two decimal digits

(CSE 2000)

116. Fluorescent tubes are fitted with

a choke. The choke coil

(a) Steps up the line voltage

(b) Steps down the line voltage

(d) Chokes low frequency currents

(CSE 2000)

117. For reproducing sound, a CD

(Compact Disc) audio player uses a

(a) Quartz crystal

(b) Titanium needle

(d) Barium titanate ceramic

(CSE 2000)

118. When a CD (compact disc

used in audio and video systems) is seen

in sunlight, rainbow like colours are seen.

This can be explained on the basis of

the phenomenon of

(a) Reflection and diffraction

(b) Reflection and transmission

(d) Refraction, diffraction and transmission

(CSE 2000)

119. Match List-I (Industrial processes)

with List-II (Industry with which

associated) and select the correct answer

using the codes given below the lists :

List I List II

A. Cracking 1. Rubber

B. Smelting 2. Petroleum

C. Hydrogenation 3. Copper

D. Vulcanization 4. Edible Fats

A B C D

(a) 3 2 1 4

(b) 2 3 4 1

(d) 3 2 4 1

(CSE 2000)

120. Within biological communities,

some species are important in

determining the ability of a large number

of other species to persist in the

community. Such species are called

(a) Keystone species

(b) Allopatric species

(d) Threatened species

(CSE 2000)

ANSWERS

1. (b) : Night blindness or nyctalopia

is caused by the deficiency of

Vitamin ‘A’. This vitamin is

necessary for the division and

growth of epithelial cells.

2. (c) 3. (b) 4. (c) 5. (c)

6. (d) 7. (c) 8. (c) 9. (a)

10. (d) 11. (b) 12. (b) 13. (b)

14. (d) 15. (c) 16. (a) 17. (d)

18. (c) 19. (c) 20. (d) 21. (c)

22. (a)

23. (b) : Spirogyra is found in fresh

water.

24. (d) 25. (b) 26. (c) 27. (b)

28. (b) 29. (d) 30. (d) 31. (a)

32. (b) 33. (a) 34. (d) 35. (b)

36. (d) 37. (a) 38. (c) 39. (a)

40. (b) 41. (a) 42. (a) 43. (c)

44. (c) 45. (d) 46. (a) 47. (c)

48. (d) 49. (c) 50. (d) 51. (b)

52. (a) 53. (d) 54. (a) 55. (b)

56. (d) 57. (c) 58. (a) 59. (a)

60. (d) 61. (b) 62. (d) 63. (d)

64. (a)

65. (a) : Methane CH4; Ethane C2H6;

Propane C3H8; Butane C4H10

66. (d) 67. (d) 68. (b) 69. (a)

70. (a) : AB is universal recipient;

O– universal donor

71. (b) 72. (b) 73. (d)

74. (c) : Mass remains same at all

places.

75. (a) 76. (c) 77. (c) 78. (b)

79. (a) 80. (b) 81. (d) 82. (b)

83. (b) 84. (b) 85. (b) 86. (b)

87. (c) 88. (a) 89. (d) 90. (b)

91. (d)

92. (d) : 4°C minimum.

93. (a) 94. (b) 95. (d)

96. (b) : Filariasis (Wucheria) is caused

by Filaria (Nematode)

97. (a) 98. (c) 99. (a) 100. (c)

101. (b) 102. (c) 103. (d) 104. (b)

105. (a) 106. (c) 107. (a) 108. (d)

109. (b) 110. (b) 111. (c) 112. (b)

113. (b) 114. (c) 115. (a) 116. (c)

117. (c) 118. (a) 119. (b) 120. (c)