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

Question # 2

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

Question # 3

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

Question # 4

Mass of proton is of order of

Question # 5

The total charge of any nucleus is given as

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

Which of the following material has smaller has life

Question # 8

The half lie of radium-226 is

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

Radioactivity was discovered by:

Question # 11

How many isotopes of helium are present?

Question # 12

Charge on proton is

Question # 13

The chemical properties of an element depends upon the number of

Question # 14

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

Question # 15

U-238 present in the natural uranium is about:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
2 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
3 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
4 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
5 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
6 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
7 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
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 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
10 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes

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