Previous year MCQs

General science UPPSC 2003 GS-I
Question

Isotopes are atoms of an element whose:

Answer & Solution

Answer: (Detailed Solution Below)

Option B: atomic weight different, but atomic number same

Detailed Solution:

The correct answer is “atomic weight different, but atomic number same”.
Isotopes are known as the atoms of the same element having the same atomic number i.e same number of protons, but different atomic mass numbers i.e different numbers of neutrons.

Similar Questions:

Ashraya Bima Yojna aims at providing:
  1. A) Allotment of house
  2. B) Housing loan
  3. C) Job to unemployed
  4. D) Security cover to workers who have lost their job
If a human disease breaks out across a large region of the world, what is it called?
  1. A) Pandemic
  2. B) Epidemic
  3. C) Endemic
  4. D) Epizootic
Which of the following is/are used as bio-fertilisers? Select the correct answer from the codes given below:

1. Azolla
2. Blue Green Algae
3. Alfalfa
4. Nitrolim

Codes:
  1. A) 1 and 2
  2. B) 1, 2 and 4
  3. C) 2, 3 and 4
  4. D) 1, 2 and 3
Which one of the following is used as the coolant in the "Fast Breeder Test Reactor" at Kalpakkam?
  1. A) Carbon dioxide
  2. B) Heavy water
  3. C) Sea water
  4. D) Molten sodium
The Indian athlete who won a bronze medal at the world Championship in Paris in August 2003, was:
  1. A) Anju B.George
  2. B) Madhuri Singh
  3. C) Neelam J. Singh
  4. D) Sunita Rani
A 'smart gel' is a:
  1. A) material mimicking life system
  2. B) gel obtained from fish
  3. C) gel obtained from the sea weed
  4. D) none of the above
Consider the following statements about human brain:

1. The brain is responsible for regulating the heart beat.
2. It is responsible for balancing the body.

Select the correct answer using the codes given below.
Codes :
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  2. B) Only 2 is correct
  3. C) 1 and 2 both are correct
  4. D) Neither 1 nor 2 is correct
Which of the following is NOT obtained from insects?
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  2. B) Evaporation
  3. C) Diffusion
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Which one of the following is NOT an example of bio-mass energy source?
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  2. B) Nuclear energy
  3. C) Gobar (Dung)
  4. D) Wood
Which one of the following is not correctly matched?
Vitamin - Role
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  2. B) Vitamin C - Antiscorbutic factor
  3. C) Vitamin D - Antisterility factor
  4. D) Vitamin K - Antihaemorrhagic factor
Consider the following statements and select the correct answer from the code given below:

1. Presence of calcium sulphate makes water hard and unfit for use.
2. Diamond is harder than copper and iron.
3. The main component of air is oxygen.
4. Nitrogen is used in the preparation of vegetable ghee.

Code:
  1. A) 1 and 2
  2. B) 3 and 4
  3. C) 1 and 3
  4. D) 2 and 4