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 was discovered by:

Question # 2

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

Question # 3

The total charge of any nucleus is given as

Question # 4

The isotope/s of hydrogen is /are:

Question # 5

U-238 present in the natural uranium is about:

Question # 6

The diameter of an atom is of the order

Question # 7

β-particles are easily deflected by collisions than heavy

Question # 8

γ-rays are

Question # 9

Mass of proton is

Question # 10

γ-rays behave like a particle because they explain the

Question # 11

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

Question # 12

The range ofβ-particle in air is greater than that ofα-particle by

Question # 13

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

Question # 14

The chemical properties of all the isotopes of an elements are

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
2 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
3 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
4 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
5 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
6 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
7 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
8 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
9 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
10 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons

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