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

Heavy water is made of one oxygen atom and two atoms of:

Question # 2

The amount of energy equivalent to 1 a.m.u is

Question # 3

When certain nucleus emits anα particle, its mass number:

Question # 4

The penetration power ofβ-particle is

Question # 5

Different radioactive material have

Question # 6

Mass of proton is of order of

Question # 7

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 8

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 9

Neutrons are

Question # 10

The nucleus left after the emission of some radiation is called:

Question # 11

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 12

The half life of radioactive substances depends upon

Question # 13

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

Question # 14

Rutherford performed an experiment on nuclear reactions in:

Question # 15

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
2 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
3 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
4 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
5 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
6 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
7 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
9 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
10 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium

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