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

Radium was discovered by:

Question # 2

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

Question # 3

Rate of decay is actually described by.

Question # 4

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

Question # 5

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 6

Mass of neutron is

Question # 7

The nucleus/nuclei of hydrogen is/are:

Question # 8

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

Question # 9

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 10

The rate of decay of a radioactive substance

Question # 11

The unit of decay constant is:

Question # 12

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

Question # 13

Different radioactive material have

Question # 14

Radioactivity was discovered by:

Question # 15

A curie represents a very strong source of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
2 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
3 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
4 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
5 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
6 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
7 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
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 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons

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