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

Heavy water is made of one oxygen atom and two atoms of:

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

The isotope/s of hydrogen is /are:

Question # 4

Nucleon means:

Question # 5

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 6

A pair of quark and antiquark makes a:

Question # 7

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 8

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

Question # 9

The range of particle depends upon the factor

Question # 10

The penetration power ofβ-particle is

Question # 11

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

Question # 12

Neutron was discovered by

Question # 13

Radioactivity was discovered by:

Question # 14

Structure of the nucleus was explained by

Question # 15

Phenomenon of radioactivity is due to disintegration of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
3 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
4 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
5 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
6 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
7 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
8 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
9 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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