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

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 2

According to Rutherford atomic model, the positive charge in an atom

Question # 3

The energy acquired by a mass of 1g moving with the speed of light is

Question # 4

Neutron was suggested to be in the nucleus by:

Question # 5

Different radioactive material have

Question # 6

Examples of moderators used in a fission reactor is/are:

Question # 7

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

Question # 8

The reciprocal of decay constant λ of a radioactive material is:

Question # 9

In radio-active decay, the original element which disintegrate to another element is called

Question # 10

When certain nucleus emits aβ-particles, is mass number:

Question # 11

Which are not the elementary particles?

Question # 12

The chemical behaviour of an atom is determined by

Question # 13

Radioactivity was discovered by:

Question # 14

A pair of quark and antiquark makes a:

Question # 15

Which of these is not a radiation detector

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
3 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
4 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
5 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
6 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
7 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
8 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
9 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
10 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23

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