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

The number of protons inside a nucleus is called

Question # 2

Rate of decay is actually described by.

Question # 3

Nucleus consists of

Question # 4

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

Question # 5

Radiation detector are used to

Question # 6

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

Question # 7

Marie curie and Pierre curie discovered:

Question # 8

Structure of the nucleus was explained by

Question # 9

When certain nucleus emits anα particle, its mass number:

Question # 10

The half life of radioactive substances depends upon

Question # 11

Charge on proton is

Question # 12

Which are not the elementary particles?

Question # 13

Radium was discovered by:

Question # 14

The time required for a radioactive material to decrease in active by one half is called

Question # 15

How much time, theα-particle more massive than an electron

Question # 16

The counter, which also provides the power to the G.M. tube is called:

Question # 17

Different radioactive material have

Question # 18

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

Question # 19

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

Question # 20

Radioactivity is

Question # 21

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 22

Which of the following material has smaller has life

Question # 23

Alfa particles are

Question # 24

The diameter of an atom is of the order

Question # 25

Mass of proton is of order of

Question # 26

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

Question # 27

The half lie of radium-226 is

Question # 28

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

Question # 29

The nucleus/nuclei of hydrogen is/are:

Question # 30

Radioactivity

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
2 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
3 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
4 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
5 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
6 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
7 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
8 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
9 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
10 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4

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