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

A pair of quark and antiquark makes a:

Question # 2

Radiation detector are used to

Question # 3

In 1932 Chadwick discovered

Question # 4

The time required for a radioactive material to decrease in active by one half is called

Question # 5

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 6

Nucleus consists of

Question # 7

β-particles are easily deflected by collisions than heavy

Question # 8

The counter, which also provides the power to the G.M. tube is called:

Question # 9

After alpha decay the atomic number of the atom

Question # 10

Which of these is not a radiation detector

Question # 11

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 # 12

Charge on proton is

Question # 13

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

Question # 14

Which of the following material has smaller has life

Question # 15

An alpha particle has a charge of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
4 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
5 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
6 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions

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