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 diameter of an atom is of the order

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

Pair production take place when energy ofγ-rays photon is

Question # 4

The most abundant isotope of neon is

Question # 5

Structure of the nucleus was explained by

Question # 6

For Protium, the mass defect is:

Question # 7

In wilson cloud chamber, the air becomes saturated with:

Question # 8

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 9

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 10

There is present in paraffin a large amount of:

Question # 11

Nucleon means:

Question # 12

The rate of decay of a radioactive substance

Question # 13

Mass of proton is

Question # 14

Radium was discovered by:

Question # 15

Radioactivity was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
2 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
3 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
4 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
10 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A

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