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

00:00
Question # 1

Curie is a unit of

Question # 2

A mass spectrograph sort out

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

The chemical properties of all the isotopes of an elements are

Question # 5

The total charge of any nucleus is given as

Question # 6

Structure of the nucleus was explained by

Question # 7

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

Question # 8

The most abundant isotope of neon is

Question # 9

The isotope/s of hydrogen is /are:

Question # 10

The unit of decay constant is:

Question # 11

Charge on proton is

Question # 12

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 13

Different radioactive material have

Question # 14

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

Question # 15

Proton was discovered by Rutherford in

Question # 16

Radioactivity is

Question # 17

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

Question # 18

Beta particles are

Question # 19

Neon gas have three isotopes whose atomic numbers are

Question # 20

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 21

The number if neutrons in the nucleus of 92U235are

Question # 22

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

Question # 23

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

Question # 24

Charge on neutron is

Question # 25

Neutron was disvovered by:

Question # 26

How much time, theα-particle more massive than an electron

Question # 27

The reciprocal of decay constant λ of a radioactive material is:

Question # 28

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

Question # 29

Which of the following material has longer half life

Question # 30

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
2 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
5 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
6 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
7 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
8 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
9 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
10 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg

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