ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

The unit of decay constant is:

Question # 4

Neutron was disvovered by:

Question # 5

Different radioactive material have

Question # 6

The chemical properties of an element depends upon the number of

Question # 7

Heavy water is made of one oxygen atom and two atoms of:

Question # 8

The counter, which also provides the power to the G.M. tube is called:

Question # 9

γ-rays are

Question # 10

The number if neutrons in the nucleus of 92U235are

Question # 11

Radioactivity was discovered by:

Question # 12

The number of isotopes of hydrogen are

Question # 13

Rate of decay is actually described by.

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

The range ofβ-particle in air is greater than that ofα-particle by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
2 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
3 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
4 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
5 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
8 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
9 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
10 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity

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