ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Mass of neutron is

Question # 2

β-particles are easily deflected by collisions than heavy

Question # 3

Structure of the nucleus was explained by

Question # 4

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

Question # 5

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

Question # 6

Neon gas have three isotopes whose atomic numbers are

Question # 7

Different radioactive material have

Question # 8

A particle having the mass of electron and charge of a proton is called a

Question # 9

The number if neutrons in the nucleus of 92U235are

Question # 10

Nucleon means:

Question # 11

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

Question # 12

According to Rutherford atomic model, the positive charge in an atom

Question # 13

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 14

The unit of decay constant is:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
2 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
3 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 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
10 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four

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