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

Rutherford performed an experiment on nuclear reactions in:

Question # 3

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 4

Radioactivity is

Question # 5

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 6

Binding energy per nucleus is

Question # 7

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

Question # 8

Radioactivity was discovered by:

Question # 9

When a nucleus emits an alpha particles, its charge number decreases by

Question # 10

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

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

A particle having the mass of electron and charge of a proton is called a

Question # 13

β-particles are easily deflected by collisions than heavy

Question # 14

There is present in paraffin a large amount of:

Question # 15

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
2 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 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
5 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
6 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
7 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
8 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
9 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
10 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams

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