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General Science

General Science
Which metal pollute the air of a big city?

Cadmium
Copper
Lead
Chromium

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General Science
Balloons are filled with

Oxygen
Helium
Nitrogen
Argon

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General Science
Which of the following has a least penetrating power?

All have same penetrating power
Alpha particles
Beta Particles
Gamma rays

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General Science
Atoms are composed of:

Electrons only
Protons only
Electrons and protons
Electrons and Nuclei

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General Science
Which among the following is a positively charged particle emitted by a radioactive element?

Alpha ray
Cathode ray
Gamma ray
Beta ray

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General Science
Which of the following is used as a moderator in nuclear reactor?

Graphite
Thorium
Radium
Ordinary water

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