Elements and Metals

1

Chemical formula for water is

A. NaAlO₂

B. H₂O

C. Al₂O₃

D. CaSiO₃

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2

Which of the following is an element?

A. Ruby

B. Sapphire

C. Emerald

D. Diamond

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3

Potassium Permanganate is used for purifying drinking water, because

A. it is a sterilising agent

B. it dissolves the impurities of water

C. it is a reducing agent

D. it is an oxidising agent

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4

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

A. Radium

B. Zinc

C. Uranium

D. Mercury

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5

Which of the following is the lightest metal?

A. Mercury

B. Lithium

C. Lead

D. Silver

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