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

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 2

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

Question # 3

Neutron was discovered by

Question # 4

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 5

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 6

Radioactivity was discovered by

Question # 7

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

Question # 8

The chemical properties of an element depends upon the number of

Question # 9

The unit of decay constant is

Question # 10

For Protium, the mass defect is:

Question # 11

Charge on proton is

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

Rutherford performed an experiment on nuclear reactions in:

Question # 17

Pair production take place when energy ofγ-rays photon is

Question # 18

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

Question # 19

Binding energy per nucleus is

Question # 20

The nucleus/nuclei of hydrogen is/are:

Question # 21

In wilson cloud chamber, the air becomes saturated with:

Question # 22

The most abundant isotope of neon is

Question # 23

Neutron was disvovered by:

Question # 24

Which of the following material has longer half life

Question # 25

The number if neutrons in the nucleus of 92U235are

Question # 26

Which of the following material has smaller has life

Question # 27

After alpha decay the atomic number of the atom

Question # 28

Alfa particles are

Question # 29

The unit of decay constant is:

Question # 30

β-particles are easily deflected by collisions than heavy

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
2 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
3 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
4 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
5 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
6 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
7 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
8 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
9 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
10 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23

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