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

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

Question # 2

Radioactivity was discovered by:

Question # 3

U-238 present in the natural uranium is about:

Question # 4

Neutrons are

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

The rate of decay of radioactive substance

Question # 8

The unit of decay constant is:

Question # 9

β-particles are easily deflected by collisions than heavy

Question # 10

The number of all the protons and neutrons in a nucleus is known as

Question # 11

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

Question # 12

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

Question # 13

Neon gas have three isotopes whose atomic numbers are

Question # 14

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

Question # 15

The isotope/s of hydrogen is /are:

Question # 16

Which of the following material has smaller has life

Question # 17

Nucleon means:

Question # 18

Three quarks make:

Question # 19

The half life of uranium-238 is

Question # 20

When certain nucleus emits anα particle, its mass number:

Question # 21

Structure of the nucleus was explained by

Question # 22

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

The most abundant isotope of neon is

Question # 28

Mass of proton is

Question # 29

Pair production take place when energy ofγ-rays photon is

Question # 30

The diameter of an atom is of the order

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
2 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
3 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
4 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
6 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
7 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
8 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
9 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
10 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity

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