ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Radioactivity was discovered by:

Question # 2

Rate of decay is actually described by.

Question # 3

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

Question # 4

The unit of decay constant is:

Question # 5

The number if neutrons in the nucleus of 92U235are

Question # 6

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

Question # 7

Nucleus consists of

Question # 8

For Protium, the mass defect is:

Question # 9

The nucleus/nuclei of hydrogen is/are:

Question # 10

Neutron was discovered in

Question # 11

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

Question # 12

The rate of decay of radioactive substance

Question # 13

Radioactivity is

Question # 14

Fraction of the decaying atoms per unit time is called

Question # 15

Beta particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
3 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
4 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
5 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
6 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
7 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 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
9 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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