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

Charge on proton is

Question # 2

Beta particles are

Question # 3

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

Question # 4

Curie is a unit of

Question # 5

The unit of decay constant is:

Question # 6

Charge on neutron is

Question # 7

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 8

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

Question # 9

The total charge of any nucleus is given as

Question # 10

The most abundant isotope of neon is

Question # 11

There is present in paraffin a large amount of:

Question # 12

Mass of proton is of order of

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

The number of isotopes of hydrogen are

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
2 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
3 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
4 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
5 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
6 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
7 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
8 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
9 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
10 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these

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