ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

00:00
Question # 1

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

Question # 2

Radioactivity is

Question # 3

The chemical behaviour of an atom is determined by

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Mass of proton is of order of

Question # 8

The emission of radiations take place in elements, having charge number greater than

Question # 9

A pair of quark and antiquark makes a:

Question # 10

The nucleus/nuclei of hydrogen is/are:

Question # 11

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

Question # 12

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

Question # 13

Examples of moderators used in a fission reactor is/are:

Question # 14

The nucleus left after the emission of some radiation is called:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
2 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
3 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
6 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
7 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
8 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
9 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
10 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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