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

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 2

The nucleus left after the emission of some radiation is called:

Question # 3

A pair of quark and antiquark makes a:

Question # 4

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 5

Neutron was suggested to be in the nucleus by:

Question # 6

After alpha decay the atomic number of the atom

Question # 7

Proton was discovered by Rutherford in

Question # 8

Different radioactive material have

Question # 9

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 10

When certain nucleus emits anα particle, its mass number:

Question # 11

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 12

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 13

When certain nucleus emits aβ-particles, is mass number:

Question # 14

U-238 present in the natural uranium is about:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
2 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
3 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
4 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
5 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
6 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
7 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
8 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
9 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
10 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.

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