Science & Technology – UPSC Prelims PYQs

A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel

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 I. Cracking II. Smelting III. Hydrogenation IV. Vulcanization

List II A) Rubber B) Petroleum C) Copper D) Edible fats

Codes:

Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.

Reason (R): Ammonia can be liquified at ambient temperatures at low pressures.

Which one of the following organisms can serve as a biofertilizer for rice crop?

At which stage in its life-cycle does the silkworm yield the fibre of commerce?

Match List I (Diseases) with List II (Types of disease) and select the correct answer using the codes given below the Lists:

List I I. Haemophilia II. Diabetes III. Diabetes IV. Ringworm

List II A) Deficiency disease B) Genetic disease C) Hormonal disorder D) Fungal infection

Codes:

The blood glucose level is commonly expressed as

Phytotron is a facility to

Match List I (Endocrine glands) with List II (Hormones secreted) and select the correct answer using the codes given below the Lists:

List I I. Gonads II. Pituitary III. Pancreas IV. Adrenal

List II A) Insulin B) Progesterone C) Growth hormones D) Cortisone

Codes:

Insect resistant cotton plants have been genetically engineered by inserting a gene from a/an

Hybridoma technology is a new biotechnological approach for commercial production of

The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by

Consider the following statements: Hard water is not suitable for I. Drinking. II. Washing clothes with soap. III. Use in boilers. IV. Irrigating crops.

Which of these statements are correct?

Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that the

Assertion (A): In human beings, the females play a major role in determining the sex of the offspring.

Reason (R): Women have two ‘X’ chromosomes.

Assertion (A): “DNA Finger-printing” has become a powerful tool to establish paternity and identity of criminals in rape and assault cases.

Reason (R): Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis.

Assertion (A): Information technology is fast becoming a very important field of activity in India.

Reason (R): Software is one of the major exports of the country and India has a very strong base in hardware.

In eye donation,

which one of the following parts of donor’s eye is utilised?

Consider the following

statement: An ordinary light bulb has a rather short life because the I. Filament wire is not uniform. II. Bulb cannot be evacuated completely. III. Wires supporting the filament melt at high temperatures.

Which of the above statements are correct?

Match the hormones in List I with items in List II and select the correct answer using the codes given below the Lists:

List I I. Adrenaline II. Estrogen III. Insulin IV. Pheromones

List II A) Anger, fear, danger B) Attracting partners through sense of smell C) Females D) Glucose

Codes:

Neem tree has acquired industrial importance as a source of

Match List I (Drugs / Chemicals) with List II (Their uses) and select the correct answer using the codes given below the Lists:

List I I. Atropine II. Ether III. Nitro-glycerine IV. Pyrethrin

List II A) Local anaesthesia B) Heart trouble C) Dilation of pupil D) Mosquito control

Codes:

Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given below the Lists:

List I I. Diamond II. Marble III. Sand IV. Ruby

List II A) Calcium B) Silicon C) Aluminium D) Carbon

Codes:

Indian farmers are unhappy over the introduction of “Terminator Seed Technology” because the seeds produced by this technology are expected to

Consider the following statements regarding a motor car battery: I. The voltage is usually 12 V. II. Electrolyte used is hydrochloric acid. III. Electrodes are lead and copper. IV. Capacity is expressed in ampere-hour.

Which of the above statements are correct?

Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the Lists:

List I I. High speed II. Wavelength III. Pressure IV. Energy

List II A) Mach B) Angstrom C) Pascal D) Joule

Codes:

Which one of the following genetic diseases is sex-linked?

For which one of the following is capillarity not the only reason?

Consider the following statements: I. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is. II. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.

Which of the above statements is/are correct?

Lathyrism is caused by excessive consumption of

Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because

Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of

Strips of two metals A and B are firmly joined together as shown in the figure. On heating, A expands more than B does. If this joined strip is heated, then it will appear as:

When ants bite, they inject

Cobalt-60 is commonly used in radiation therapy because it emits

Low temperatures (Cryogenics) find application in

Consider the following statements:

I. Glass can be etched or scratched by diamond. II. Glass can be etched or scratched by hydrofluoric acid. III. Glass can be etched or scratched by aqua regia. IV. Glass can be etched or scratched by concentrated sulphuric acid.

Which of these statements are correct?

Assertion (A): To dilute sulphuric acid, acid is added to water and not water to acid.

Reason (R): Specific heat of water is quite large.

Assertion (A): Insect-resistant transgenic cotton has been produced by inserting Bt gene.

Reason (R): The Bt gene is derived from a bacterium.

Assertion (A): Dolly was the first cloned mammal.

Reason (R): Dolly was produced by in-vitro fertilization.

In a business concern, there are four functions, namely, Production (PR), Finance (FN), Personnel (PS) and Marketing (MK). The Customer (C) may also play a role in the prosperity of the concern. Match List I with List II and select the correct answer using the codes given below the Lists:

List I – Pie Diagram I. II. III. IV.

List II – Statement A) Customer is the controlling factor B) Marketing is an integrating factor while customer is the controlling factor C) Marketing is the controlling factor D) Marketing is more important than others E) Marketing is as equal a function as the others

Codes: a) I-D, II-C, III-A, IV-B b) I-E, II-D, III-A, IV-B c) I-D, II-C, III-B, IV-E d) I-E, II-D, III-B, IV-A

A hunter aims his gun at a point between the eyebrows of a monkey sitting on a branch of a tree. Just as he fires, the monkey jumps down. The bullet will

The damage to the Spektr Module of the Russian Space Station Mir was due to

Which of the following statements are true about the Indian-born woman astronaut Kalpana Chawla? I. She was born in Karnal. II. She flew on board the shuttle flight STS-87. III. She was trained at the Kennedy Space Centre. IV. She did a space-walk to retrieve the Spartan Satellite.

Select the correct answer using the codes given below:

The satellites

of which one of the following countries have helped in the preparation of a detailed and complete map of Antarctica?

Match List I with List II

and select the correct answer using the codes given below the lists:

List I I. Potassium bromide II. Potassium nitrate III. Potassium sulphate IV. Mono-potassium tartrate

List II A. Fertiliser B. Photography C. Bakery D. Gunpowder

Codes:

Which one of the following elements is essential for the construction of nuclear reactors?

Consider the following statements regarding asteroids: I. Asteroids are rocky debris of varying sizes orbiting the Sun. II. Most of the asteroids are small but some have diameter as large as 1000 km. III. The orbit of asteroids lies between the orbits of Jupiter and Saturn. Of these statements:

Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to I. Act as a reducing agent. II. Remove silica associated with the iron ore. III. Function as fuel, to supply heat. IV. Act as an oxidizing agent. Of these statements:

Which one of the following metals does not form amalgams?