Previous year MCQs

General science UPPSC 2001 GS-I
Question

The energy of the sun is produced by?

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Nuclear fusion

Detailed Solution:

The correct answer is “Nuclear fusion”.
The energy of the sun is produced by (2) Nuclear fusion.

Nuclear fusion is the process where atomic nuclei of lighter elements combine to form a heavier nucleus, releasing a tremendous amount of energy. This is what happens in the core of the sun, where immense pressure and temperature cause hydrogen atoms to fuse into helium, generating the sun's energy.

Similar Questions:

Refrigeration helps in food preservation by
  1. A) killing of germs (bacteria)
  2. B) reducing the rate of biochemical reaction
  3. C) destroying the enzyme action
  4. D) sealing food with a layer of ice
The instrument used to measure the blood pressure is:
  1. A) Tachometer
  2. B) Sphygmomanometer
  3. C) Actiometer
  4. D) Barometer
Funk invented
  1. A) Vitamins
  2. B) Hormones
  3. C) Proteins
  4. D) Enzymes
As per World Development Report 2000, the highest per capita income is in:
  1. A) Luxembourg
  2. B) Switzerland
  3. C) Norway
  4. D) Japan
Thermodynamically the most stable form of carbon is
  1. A) Coal
  2. B) Fullerenes
  3. C) Graphite
  4. D) Diamond
Which one of the following is not the genetic disease?
  1. A) Night blindness
  2. B) Haemophilia
  3. C) Albinism
  4. D) Colour blindness
Human heart is made up of how many chambers?
  1. A) Only four
  2. B) Only one
  3. C) Only three
  4. D) Only two
A hydrophyte is:
  1. A) a marine animal
  2. B) an aquatic plant
  3. C) a plant disease
  4. D) a rootless plant
The diamond appears lustrous because of:
  1. A) Reflection
  2. B) Refraction
  3. C) Total Internal Reflection
  4. D) Scattering
Which of the following is used in fire alarm ?
  1. A) Photo cell
  2. B) Water
  3. C) Solar cell
  4. D) None of the above
Assertion (A): Detergents easily remove oil and dirt from soiled garments.
Reason (R): Detergents increase the surface tension of water.
  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 the correct explanation of A
  3. C) A is true but R is false
  4. D) A is false but R is true
Which one of the following pairs is not correctly matched?
  1. A) Dry ice:solid carbon dioxide
  2. B) Mustard gas:poisonous liquid used in chemical warfare
  3. C) Teflon:polymer containing fluorine
  4. D) Fullerene:organic compounds containing fluorine