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

00:00
Question # 1

The half life of uranium-238 is

Question # 2

After alpha decay the atomic number of the atom

Question # 3

The range of particle depends upon the factor

Question # 4

Three quarks make:

Question # 5

Binding energy per nucleus is

Question # 6

Radioactivity

Question # 7

The total charge of any nucleus is given as

Question # 8

Neutron was discovered in

Question # 9

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

Question # 10

The reciprocal of decay constant λ of a radioactive material is:

Question # 11

Mass of proton is of order of

Question # 12

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

Question # 13

The rate of decay of radioactive substance

Question # 14

Fraction of the decaying atoms per unit time is called

Question # 15

Which of these is not a radiation detector

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
2 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
5 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
6 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
7 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
8 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927

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