ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

00:00
Question # 1

Charge on proton is

Question # 2

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

Question # 3

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 4

When certain nucleus emits anα particle, its mass number:

Question # 5

γ-rays behave like a particle because they explain the

Question # 6

The total charge of any nucleus is given as

Question # 7

Curie is a unit of

Question # 8

Which are not the elementary particles?

Question # 9

Nucleon means:

Question # 10

Nucleus consists of

Question # 11

In wilson cloud chamber, the air becomes saturated with:

Question # 12

Radium was discovered by:

Question # 13

Three quarks make:

Question # 14

The number of isotopes of hydrogen are

Question # 15

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
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 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
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 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
7 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
8 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
10 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

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