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

Radioactivity is

Question # 2

Neon gas have three isotopes whose atomic numbers are

Question # 3

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

Question # 4

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

Question # 5

Radioactivity was discovered by:

Question # 6

Neutrons are

Question # 7

Mass of neutron is

Question # 8

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

Question # 9

Radioactivity

Question # 10

There is present in paraffin a large amount of:

Question # 11

The unit of decay constant is:

Question # 12

The time required for a radioactive material to decrease in active by one half is called

Question # 13

Examples of moderators used in a fission reactor is/are:

Question # 14

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 15

Radioactivity was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
2 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
3 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
4 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
5 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
6 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
7 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
8 The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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