Science & Technology

The Nobel Prize for deciphering the language of bees was awarded to

1. (a)H. G. Khurana
2. (b)K. V. Frisch
3. (c)Julian Huxley
4. (d)Dorothy Hodgkins

In the field of space technology, India has demonstrated during 1994 her capability to

1. (a)design advanced inter-continental ballistic missile warning systems
2. (b)build satellites
3. (c)build stealth missiles
4. (d)launch geo-stationary satellites

Comet Shoemaker-Levy 9 hit the planet

1. (a)Pluto
2. (b)Mars
3. (c)Jupiter
4. (d)Saturn

Examine the following statements: I. All children are inquisitive. II. Some children are inquisitive. III. No children are inquisitive. IV. Some children are not inquisitive. Among these statements, the two statements which cannot both be true simultaneously but can both be false would be

1. (a)I and III
2. (b)I and IV
3. (c)II and III
4. (d)III and IV

101. Which one of the following is a mixed fertilizer?

1. (a)CAM
2. (b)Urea
3. (c)Ammonium Sulphate
4. (d)NPK

102. Which one of the following polymers is widely used for making bullet-proof material?

1. (a)Polyvinyl chloride
2. (b)Polyamides
3. (c)Polyethylene
4. (d)Polycarbonates

103. The chemical used as a ‘fixer’ in photography is

1. (a)sodium sulphate
2. (b)sodium thiosulphate
3. (c)ammonium persulphate
4. (d)borax

104. The technique used to transmit audio signals in television broadcasts is

1. (a)Amplitude Modulation
2. (b)Frequency Modulation
3. (c)Pulse Code Modulation
4. (d)Time Division Multiplexing

105. A parachutist jumps from a height of 5000 metres. The relationship between his falling speed ‘v’ and the distance fallen through ‘d’ is best represented as (four graphs labelled a, b, c, d).

1. (a)Graph (a)
2. (b)Graph (b)
3. (c)Graph (c)
4. (d)Graph (d)

106. Which one of the following can be used to confirm whether drinking water contains a gamma-emitting isotope or not?

1. (a)Microscope
2. (b)Lead plate
3. (c)Scintillation counter
4. (d)Spectrophotometer

107. The normal temperature of human body on the Kelvin scale is

1. (a)280
2. (b)290
3. (c)300
4. (d)310

108. When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

1. (a)pitch, loudness and quality
2. (b)pitch and loudness
3. (c)quality only
4. (d)loudness only

109. Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape. Reason (R): The refractive index of diamond is less than that of glass. In the context of the above two statements, which one of the following is correct?

1. (a)Both A and R are true, and R is the correct explanation of A
2. (b)Both A and R are true, but R is not a correct explanation of A
3. (c)A is true, but R is false
4. (d)A is false, but R is true

110. Who among the following anticipated Newton by declaring that all things gravitate to the earth?

1. (a)Aryabhata
2. (b)Varahamihira
3. (c)Buddha Gupta
4. (d)Brahmagupta

111. Optical fibre works on the principle of

1. (a)total internal reflection
2. (b)refraction
3. (c)scattering
4. (d)interference

112. Suppose a rocketship is receding from the earth at a speed of 2⁄10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?

1. (a)Blue
2. (b)Orange
3. (c)Yellow
4. (d)Yellow-orange

113. Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers, etc.?

1. (a)Nickel and cadmium
2. (b)Zinc and carbon
3. (c)Lead peroxide and lead
4. (d)Iron and cadmium

114. Cryogenic engines find applications in

1. (a)sub-marine propulsion
2. (b)frost-free refrigerators
3. (c)rocket technology
4. (d)researches in superconductivity

An air bubble in water will act like a

1. (a)convex mirror
2. (b)convex lens
3. (c)concave mirror
4. (d)concave lens

The difference between a nuclear reactor and an atomic bomb is that

1. (a)no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
2. (b)the chain reaction in nuclear reactor is controlled
3. (c)the chain reaction in nuclear reactor is not controlled
4. (d)no chain reaction takes place in atomic bomb while it takes place in nuclear reactor

Which one of the following sets is correctly matched?

1. (a)Diphtheria, Pneumonia and Leprosy: Hereditary
2. (b)AIDS, Syphilis and Gonorrhoea: Bacterial
3. (c)Colour blindness, Haemophilia and Sickle cell anaemia: Sex linked
4. (d)Polio, Japanese B encephalitis and plague: Viral

No answer is recorded for this question: (None of the options (a–d) is correct)

A person with ‘AB’ blood group is sometimes called a universal recipient because of the

1. (a)lack of antigen in his blood
2. (b)lack of antibodies in his blood
3. (c)lack of both antigens and antibodies in his blood
4. (d)presence of antibodies in his blood

Which one of the following is a membrane that protects the developing embryo from desiccation?

1. (a)Amnion
2. (b)Allantois
3. (c)Chorion
4. (d)Yolk sac

Which one of the following antimicrobial drugs is suitable for treatment of both tuberculosis and leprosy?

1. (a)Isoniazid
2. (b)p-aminosalicylic acid
3. (c)Streptomycin
4. (d)Rifampicin

Most of the desert plants bloom during night time because

1. (a)their blooming is controlled by low temperature
2. (b)they are sensitive to the phases of moon
3. (c)the desert insects eat away flowers during day time
4. (d)the desert insects are active during night time