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

A pair of quark and antiquark makes a:

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

Neutron was discovered by

Question # 4

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

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

The rate of decay of radioactive substance

Question # 7

Binding energy per nucleus is

Question # 8

Which of these is not a radiation detector

Question # 9

Three quarks make:

Question # 10

Gamma rays consist of steam of

Question # 11

Structure of the nucleus was explained by

Question # 12

Nucleus of a hydrogen atom may contain:

Question # 13

Beta particles are

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Curie is a unit of

Question # 18

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 19

The chemical properties of all the isotopes of an elements are

Question # 20

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 # 21

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

Question # 22

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

Question # 23

Neutron was discovered in

Question # 24

Charge on proton is

Question # 25

1 amu is equal to.

Question # 26

β-particles are easily deflected by collisions than heavy

Question # 27

The number if neutrons in the nucleus of 92U235are

Question # 28

Radioactivity

Question # 29

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

Question # 30

The isotope/s of hydrogen is /are:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
2 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
3 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 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
6 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
7 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
8 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
9 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
10 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143

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