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

Radioactivity is

Question # 2

Which of these is not a radiation detector

Question # 3

Phenomenon of radioactivity is due to disintegration of

Question # 4

γ-rays are

Question # 5

Nuclei that have the same charge number but different mass number are called

Question # 6

A curie represents a very strong source of

Question # 7

Which of the following material has longer half life

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

The diameter of an atom is of the order

Question # 10

Radioactivity

Question # 11

Neon gas have three isotopes whose atomic numbers are

Question # 12

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

Question # 13

After alpha decay the atomic number of the atom

Question # 14

Mass of proton is

Question # 15

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 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
3 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
4 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
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 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
7 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
8 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'

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