Previous year MCQs

General science UPPSC 1994 GS-I
Question

The working principle of atom bomb is nuclear fission of uranium and the working principle of hydrogen bomb is:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: nuclear fusion of deuterium

Detailed Solution:

The correct answer is “nuclear fusion of deuterium”.
Atom bomb relies on nuclear fission, splitting heavy atoms (like uranium) to release energy.

A hydrogen bomb (or thermonuclear bomb) works on the principle of nuclear fusion, where isotopes of hydrogen, such as deuterium and tritium, are fused together at extremely high temperatures to release a massive amount of energy.

Similar Questions:

The remark "Nehru is a patriot, while Jinnah is a politician" was made by:
  1. A) M.K.Gandhi
  2. B) Maulana Azad
  3. C) Sir Mohammad Iqbal
  4. D) Khan Abdul Gaffar Khan
Match List-I with List-II and select the correct answer from the code given below the lists:
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 1 4 3
  3. C) 4 3 1 2
  4. D) 3 4 2 1
Which of the following laser types is used in a laser printer?
  1. A) Dye laser
  2. B) Semiconductor laser
  3. C) Excimer laser
  4. D) Gas laser
Study of Zoology deals with:
  1. A) Living animals only
  2. B) Living plants only
  3. C) Both living and dead animals
  4. D) Both living and dead plants
Match the following plans and programmes:
Plans - Programmes

A. 1st Plan - 1. Rapid Industrialisation
B. 2nd Plan - 2. Community Development
C. 3rd Plan - 3. Expansion of basic industries
D. 4th Plan - 4. Minimum Needs Programme
E. 5th Plan - 5. Achievement of self reliance and growth with stability

Select the correct answer form the code below:
A B C D E
  1. A) 1 2 3 4 5
  2. B) 2 1 4 5 3
  3. C) 2 1 3 4 5
  4. D) 2 1 3 5 4
Polythene bags cannot be destroyed because it is made:
  1. A) From Non degradable substances
  2. B) From inorganic compounds
  3. C) From polymers
  4. D) From protein
Which one of the following States is the largest producer of tea in India?
  1. A) Assam
  2. B) Tamil Nadu
  3. C) Arunachal Pradesh
  4. D) West Bengal
Rock-cut temples of Mahabalipuram were built by:
  1. A) Pallavas
  2. B) Cholas
  3. C) Chalukyas
  4. D) Rashtrakutas
Balance of payment is defined as:
  1. A) The value of exports minus the value of imports
  2. B) The difference between the liabilities and assets of a firm
  3. C) The difference between current expenditure and current revenue in the government budget
  4. D) Complete record of all economic transactions between the residents of a country and rest of the world
Which among the following compounds is the main constituent of natural gas ?
  1. A) Butane
  2. B) Hexane
  3. C) Benzene
  4. D) Methane
Which of the following pairs is NOT correctly matched ?
Quantity – S. I. Unit
  1. A) Activity of radio active substance – Curie
  2. B) Power of lense – Diopter
  3. C) Heat – Joule
  4. D) Pressure – Pascal
Match List-I with List-II and select the correct answer using the codes given below the lists.
List-I List-II
(Disease) (Cause)

A. Marasmus - 1. Prolonged Starvation
B. Kwashiorkor - 2. Protein Deficiency
C. T.B. - 3. Bacterial Infection
D. Hepatitis B - 4. Viral Infection
  1. A) 1 2 3 4
  2. B) 2 1 3 4
  3. C) 4 2 3 1
  4. D) 2 4 1 3