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 half lie of radium-226 is

Question # 2

There is present in paraffin a large amount of:

Question # 3

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

Question # 4

The number of protons inside a nucleus is called

Question # 5

When a nucleus emits an alpha particles, its charge number decreases by

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

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

Question # 8

An alpha particle has a charge of

Question # 9

U-238 present in the natural uranium is about:

Question # 10

Neutron was discovered in

Question # 11

Three quarks make:

Question # 12

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

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

The unit of decay constant is

Question # 15

Binding energy per nucleus is

Question # 16

The unit of decay constant is:

Question # 17

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

Question # 18

The half life of uranium-238 is

Question # 19

Charge on proton is

Question # 20

When certain nucleus emits anα particle, its mass number:

Question # 21

Beta particles are

Question # 22

The rate of decay of radioactive substance

Question # 23

Rate of decay is actually described by.

Question # 24

The chemical properties of an element depends upon the number of

Question # 25

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

Question # 26

The rate of decay of a radioactive substance

Question # 27

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

Question # 28

The nucleus/nuclei of hydrogen is/are:

Question # 29

The energy acquired by a mass of 1g moving with the speed of light is

Question # 30

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

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Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
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 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
5 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
6 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
7 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
8 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
9 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
10 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral

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