General Science - Elements and Metals (1)

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General Science - Elements and Metals

1. 

Which of the following is an element?
A. Ruby
B. Sapphire
C. Emerald
D. Diamond

Answer: Option D

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2. 

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

Answer: Option D

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3. 

Which of the following metals remain in liquid for under normal conditions?
A. Radium
B. Zinc
C. Uranium
D. Mercury

Answer: Option D

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4. 

Which of the following is the lightest metal?
A. Mercury
B. Lithium
C. Lead
D. Silver

Answer: Option B

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5. 

Amalgams are
A. highly coloured alloys
B. alloys which contain mercury as one of the contents
C. alloys which have great resistance to abrasion
D. alloys which contain carbon

Answer: Option B

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6. 

The main constituents of pearls are
A. calcium oxide and ammonium chloride
B. calcium carbonate and magnesium carbonate
C. aragonite and conchiolin
D. ammonium sulphate and sodium carbonate

Answer: Option B

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7. 

Which of the following is not an isotope of hydrogen?
A. Tritium
B. Deuterium
C. Protium
D. Yttrium
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8. 

Water is a good solvent of ionic salts because
A. it has a high specific heat
B. it has no colour
C. it has a high dipole moment
D. it has a high boiling point

Answer: Option C

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