ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

There is present in paraffin a large amount of:

Question # 2

Charge on neutron is

Question # 3

In radio-active decay, the original element which disintegrate to another element is called

Question # 4

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

Question # 5

For Protium, the mass defect is:

Question # 6

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

Question # 7

Phenomenon of radioactivity is due to disintegration of

Question # 8

The half life of radioactive substances depends upon

Question # 9

The rate of decay of a radioactive substance

Question # 10

The rate of decay of radioactive substance

Question # 11

Marie curie and Pierre curie discovered:

Question # 12

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

Question # 13

Curie is a unit of

Question # 14

Radiation detector are used to

Question # 15

A mass spectrograph sort out

Question # 16

Radioactivity was discovered by:

Question # 17

After alpha decay the atomic number of the atom

Question # 18

1 amu is equal to

Question # 19

γ-rays behave like a particle because they explain the

Question # 20

Neutron was disvovered by:

Question # 21

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 22

The figure 1.007276μ shows the mass of an:

Question # 23

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

Question # 24

1 amu is equal to.

Question # 25

In wilson cloud chamber, the air becomes saturated with:

Question # 26

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

Question # 27

Neon gas have three isotopes whose atomic numbers are

Question # 28

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 29

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

Question # 30

The unit of decay constant is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
2 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
3 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
4 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
5 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
6 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
7 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
8 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
9 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
10 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3

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