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Which of the following is not an isotope of hydrogen?

Tritium
Deuterium
Protium
Yttrium
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Amalgams are

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Which of the following is the lightest metal?

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Which of the following metals remain in liquid for under normal conditions?

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Potassium Permanganate is used for purifying drinking water, because

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Which of the following is an element?

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

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

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Atoms are composed of

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In an atomic explosion, enormous energy is released which is due to

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