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

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

Question # 2

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

Question # 3

Three quarks make:

Question # 4

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

Question # 5

Structure of the nucleus was explained by

Question # 6

Mass of neutron is

Question # 7

Radioactivity was discovered by

Question # 8

The half lie of radium-226 is

Question # 9

Pair production take place when energy ofγ-rays photon is

Question # 10

Which of the following material has longer half life

Question # 11

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

Question # 12

The amount of energy equivalent to 1 a.m.u is

Question # 13

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 14

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

Question # 15

Electrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
3 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
4 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
5 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
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
8 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these

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