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

Which of the following material has smaller has life

Question # 2

U-238 present in the natural uranium is about:

Question # 3

The half life of uranium-238 is

Question # 4

Rate of decay is actually described by.

Question # 5

Charge on neutron is

Question # 6

Neutron was disvovered by:

Question # 7

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

Question # 8

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

Question # 9

Which are not the elementary particles?

Question # 10

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

Question # 11

The total charge of any nucleus is given as

Question # 12

Neutrons are

Question # 13

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 14

Which of these is not a radiation detector

Question # 15

The range of particle depends upon the factor

Question # 16

The range ofβ-particle in air is greater than that ofα-particle by

Question # 17

The number of isotopes of hydrogen are

Question # 18

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 # 19

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

Question # 20

For Protium, the mass defect is:

Question # 21

After alpha decay the atomic number of the atom

Question # 22

The number if neutrons in the nucleus of 92U235are

Question # 23

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

Question # 24

The number of protons inside a nucleus is called

Question # 25

The most abundant isotope of neon is

Question # 26

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

Question # 27

A mass spectrograph sort out

Question # 28

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

Question # 29

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

Question # 30

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
3 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
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 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
8 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
9 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
10 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000

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