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

Question # 2

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

Question # 3

When certain nucleus emits anα particle, its mass number:

Question # 4

Neutron was disvovered by:

Question # 5

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

Question # 6

Nucleus consists of

Question # 7

Rate of decay is actually described by.

Question # 8

Radium was discovered by:

Question # 9

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

Question # 10

The most abundant isotope of neon is

Question # 11

The energy is found from Einstein's mass energy relation is called

Question # 12

1 amu is equal to.

Question # 13

Neutrons are

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

The figure 1.007276μ shows the mass of an:

Question # 18

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

Question # 19

Nucleon means:

Question # 20

γ-rays are

Question # 21

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

Question # 22

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

Question # 23

The number if neutrons in the nucleus of 92U235are

Question # 24

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

Question # 25

U-238 present in the natural uranium is about:

Question # 26

Radioactivity is

Question # 27

For Protium, the mass defect is:

Question # 28

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 29

Structure of the nucleus was explained by

Question # 30

A mass spectrograph sort out

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
3 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
4 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
6 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
7 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
8 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
9 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
10 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23

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