Question # 1

The number of protons in any atom are always equal to the number of

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Neutrons

Electrons

Positrons

Mesoris

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

Nuclear fission chain reaction is controlled by using.

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Cadmium rods

Iron rods

Platinum rods

Steel rods

The mass of protons is:

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1.675 x 10^-27 kg

1.693 x 10^-27 kg

1.673 x 10^-31 kg

1.673 x 10^-27 kg

Mass equivalent of 931 MeV energy is:

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6.02 x 10^-23 kg

1.766 x 10^-27kg

2.67 x 10^-29kg

6.02 x 10^-87kg

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

Energy released by conversion of 1 amu is

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200 MeV

931 MeV

233 MeV

243 MeV

A pair of quark and anti quark makes a.

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Meason

harden

Lapton

Baryon

The radio active nuclide ₈₆Ra²²⁸ decays by a series of emissions of three alpha particles and one beta particle. The nuclide X finally formed is:

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₆₄X²²⁰

₈₆X²²²

₈₄X²¹⁶

₈₈X²¹⁵

Rutherford performed on experiment on a nuclear reaction in:

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1921

1981

1927

1932

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

Both Xenon and cesium have

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33 isotopes

34 Isotopes

36 Isotopes

35 Isotopes

The background radiation to which we are exposed, on the average is.

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1 mSv per year

2 mSv per year

3 mSv per year

4 mSv per year

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

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Physics ICS Part 2 Chapter 21 Online MCQ's Test MCQs With Answers

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