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

The figure 1.007276μ shows the mass of an:

Question # 2

Radioactivity is

Question # 3

The total charge of any nucleus is given as

Question # 4

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 5

Fraction of the decaying atoms per unit time is called

Question # 6

After alpha decay the atomic number of the atom

Question # 7

Neutrons are

Question # 8

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

Question # 9

1 amu is equal to

Question # 10

Proton was discovered by Rutherford in

Question # 11

β-particles are easily deflected by collisions than heavy

Question # 12

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

Question # 13

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

Question # 14

The energy is found from Einstein's mass energy relation is called

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 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
2 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
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 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 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
7 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
8 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
9 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
10 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these

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