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

The most abundant isotope of neon is

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

1 amu is equal to.

Question # 4

The half lie of radium-226 is

Question # 5

The chemical properties of all the isotopes of an elements are

Question # 6

Radioactivity is

Question # 7

Radioactivity was discovered by:

Question # 8

In wilson cloud chamber, the air becomes saturated with:

Question # 9

The chemical behaviour of an atom is determined by

Question # 10

In 1932 Chadwick discovered

Question # 11

A mass spectrograph sort out

Question # 12

U-238 present in the natural uranium is about:

Question # 13

γ-rays are

Question # 14

The total charge of any nucleus is given as

Question # 15

How many isotopes of helium are present?

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
4 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
5 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
6 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
7 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
8 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
9 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
10 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

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