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

Radioactivity is

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

Rate of decay is actually described by.

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 6

Nucleus consists of

Question # 7

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

Question # 8

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

Question # 9

Charge on proton is

Question # 10

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

Question # 11

When certain nucleus emits anα particle, its mass number:

Question # 12

Neutrons are

Question # 13

Radiation detector are used to

Question # 14

Electrons are

Question # 15

Radioactivity was discovered by

Question # 16

For Protium, the mass defect is:

Question # 17

The diameter of an atom is of the order

Question # 18

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

Question # 19

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

Question # 20

γ-rays are

Question # 21

The unit of decay constant is:

Question # 22

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

Question # 23

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

Question # 24

A pair of quark and antiquark makes a:

Question # 25

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

Question # 26

The number of all the protons and neutrons in a nucleus is known as

Question # 27

β-particles are easily deflected by collisions than heavy

Question # 28

Neon gas have three isotopes whose atomic numbers are

Question # 29

1 amu is equal to

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
2 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
3 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
4 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
5 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
6 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
7 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
8 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these

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