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 proton is

Question # 2

Radioactivity was discovered by

Question # 3

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

Question # 4

The most abundant isotope of neon is

Question # 5

Radioactivity is

Question # 6

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

Question # 7

Curie is a unit of

Question # 8

An alpha particle has a charge of

Question # 9

The unit of decay constant is

Question # 10

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

Question # 11

The diameter of an atom is of the order

Question # 12

The rate of decay of radioactive substance

Question # 13

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

Question # 14

The unit of decay constant is:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
2 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
3 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
4 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
7 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
8 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
10 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg

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