Question # 1

Proton was discovered by Rutherford in

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1915

1906

1910

1920

The nucleus/nuclei of hydrogen is/are:

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Proton

Deuteron

Triton

All of these

None of these

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

The number if neutrons in the nucleus of ₉₂U²³⁵are

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Infinite

92

235

143

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

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600

7000

5000

15000

For Protium, the mass defect is:

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Infinite

Zero

Very large

A few grams

None of these

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

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atomic number

mass number

charge number

none of these

The range ofβ-particle in air is greater than that ofα-particle by

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1000 times

100 times

15 times

10 times

The isotope/s of hydrogen is /are:

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Protium

Deuterium

Tritium

Both (A) and (B)

All of these

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

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-4

4

2

1

A curie represents a very strong source of

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α-particle

β-particle

γ-particle

none of these

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

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A - Z

A + Z

Z

A

Which of the following material has smaller has life

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uranium

polonium

radium

radian

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

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9.315 Mev

93.15 Mev

931.5 Mev

2.22 Mev

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