ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 2

The counter, which also provides the power to the G.M. tube is called:

Question # 3

1 amu is equal to.

Question # 4

Proton was discovered by Rutherford in

Question # 5

Radium was discovered by:

Question # 6

1 amu is equal to

Question # 7

Which are not the elementary particles?

Question # 8

γ-rays behave like a particle because they explain the

Question # 9

Different radioactive material have

Question # 10

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

Question # 11

Neutron was disvovered by:

Question # 12

Structure of the nucleus was explained by

Question # 13

The most abundant isotope of neon is

Question # 14

The penetration power ofβ-particle is

Question # 15

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 16

Nucleus consists of

Question # 17

The number of all the protons and neutrons in a nucleus is known as

Question # 18

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

Question # 19

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 20

The isotope/s of hydrogen is /are:

Question # 21

The chemical properties of all the isotopes of an elements are

Question # 22

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

Question # 23

Mass of neutron is

Question # 24

Neutrons are

Question # 25

U-238 present in the natural uranium is about:

Question # 26

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 27

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

Question # 28

Phenomenon of radioactivity is due to disintegration of

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
4 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
5 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
6 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
7 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
8 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
9 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
10 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

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