Previous year MCQs

General science UPPSC 2006 GS-I
Question

The energy of the sun is produced by

Answer & Solution

Answer: (Detailed Solution Below)

Option C: Nuclear fusion

Detailed Solution:

The correct answer is “Nuclear fusion”.
Nuclear fusion reactions occur in the core of the Sun, where hydrogen nuclei combine to form helium nuclei, releasing vast amounts of energy in the process.

Similar Questions:

I.C. chips for computers are usually made of:
  1. A) leaf
  2. B) chromium
  3. C) silicon
  4. D) gold
Without green house effect, the average temperature of earth surface would be:
  1. A) 0°C
  2. B) -18°C
  3. C) 5°C
  4. D) -20°C
Thermodynamically the most stable form of carbon is
  1. A) Coal
  2. B) Fullerenes
  3. C) Graphite
  4. D) Diamond
Blue green algae are chiefly used as bio-fertiliser in the crop of
  1. A) Wheat
  2. B) Gram
  3. C) Paddy
  4. D) Mustard
Match List-I with List-II and select the correct answer by using the codes given below the lists:
List-I List-II

A. LED - 1. 'Bubble boy' Syndrome
B. LCD - 2. Bird disease
C. SARS - 3. Cost-effective light source
D. SCID - 4. Popular and effective mobile screen

Code: A B C D
  1. A) 2 3 1 2
  2. B) 4 3 2 1
  3. C) 1 2 4 3
  4. D) 3 4 2 1
ABC Index announced by the Government of India is associated with which of the following?
  1. A) Agriculture
  2. B) Communication
  3. C) Health
  4. D) Education
In which of the following conditions wet clothes will dry earliest?
  1. A) 100% RH, 60° C temperature
  2. B) 100% RH, 20° C temperature
  3. C) 20% RH, 20° C temperature
  4. D) 20% RH, 60° C temperature
"Euro norms" are meant for:
  1. A) regulating vehicular speed
  2. B) classifying size of the vehicle
  3. C) regulating vehicular emission of harmful gases
  4. D) specifying power of the engine
Diffusion of light in the atmosphere takes place due to:
  1. A) Carbon dioxide
  2. B) Dust particles
  3. C) Helium
  4. D) Water vapours
Which one of the following pair is NOT correctly matched ?
  1. A) Neoprene – Specialized rubber
  2. B) Aspartame – Synthetic sweetener
  3. C) Oxytocin – Hormone
  4. D) Rayon – Modified starch
Match lists-I and List-II and select the correct answer from the code given below:
List-I (Physical Quantities) - List-II (Units)

A. Acceleration - 1. Joule
B. Force - 2. Newton-second
C. Work done - 3. Newton
D. Impulse - 4. Metre/Second2

Code:
A B C D
  1. A) 1 2 3 4
  2. B) 2 3 4 1
  3. C) 3 4 1 2
  4. D) 4 3 1 2
Vinegar is an aqueous solution of:
  1. A) Oxalic acid
  2. B) Citric acid
  3. C) Hydrochloric acid
  4. D) Acetic acid