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

Charge on proton is

Question # 2

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

Question # 3

Mass of proton is

Question # 4

After alpha decay the atomic number of the atom

Question # 5

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

Question # 6

Which of the following material has smaller has life

Question # 7

Nucleus of a hydrogen atom may contain:

Question # 8

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 9

The isotope/s of hydrogen is /are:

Question # 10

γ-rays are

Question # 11

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

Question # 12

Fraction of the decaying atoms per unit time is called

Question # 13

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

Question # 14

The number if neutrons in the nucleus of 92U235are

Question # 15

The chemical properties of an element depends upon the number of

Question # 16

The number of protons inside a nucleus is called

Question # 17

Electrons are

Question # 18

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

Question # 19

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

Question # 20

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 21

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

Question # 22

Neutron was suggested to be in the nucleus by:

Question # 23

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

Question # 24

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

Question # 25

The diameter of an atom is of the order

Question # 26

1 amu is equal to

Question # 27

Nucleon means:

Question # 28

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 # 29

Radioactivity was discovered by

Question # 30

The range of particle depends upon the factor

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
2 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
3 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
4 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
5 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
6 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
7 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
10 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above

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