ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

A curie represents a very strong source of

Question # 2

Which of the following material has longer half life

Question # 3

The half life of uranium-238 is

Question # 4

Which are not the elementary particles?

Question # 5

The unit of decay constant is

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

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

Question # 9

Radioactivity was discovered by:

Question # 10

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 11

An alpha particle has a charge of

Question # 12

Beta particles are

Question # 13

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 14

The chemical behaviour of an atom is determined by

Question # 15

The figure 1.007276μ shows the mass of an:

Question # 16

Neutrons are

Question # 17

Radioactivity is

Question # 18

The rate of decay of a radioactive substance

Question # 19

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 20

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 21

Nucleon means:

Question # 22

Binding energy per nucleus is

Question # 23

For Protium, the mass defect is:

Question # 24

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 25

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

Question # 26

The amount of energy equivalent to 1 a.m.u is

Question # 27

The chemical properties of all the isotopes of an elements are

Question # 28

γ-rays are

Question # 29

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 # 30

The most abundant isotope of neon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
2 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
3 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
4 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
5 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 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
9 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
10 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four

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