GROWTH AND NUTRITION OF BACTERIA QUESTIONS

11.

Bromine is a
A.     black solid
B.     red liquid
C.     colourless gas
D.     highly inflammable gas
Answer & Explanation

Answer: Option B

Explanation:

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12.

The hardest substance available on earth is
A.     Gold    B.     Iron
C.     Diamond    D.     Platinum
Answer & Explanation

Answer: Option C

Explanation:

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13.

The variety of coal in which the deposit contains recognisable traces of the original plant material is
A.     bitumen    B.     anthracite
C.     lignite    D.     peat
Answer & Explanation

Answer: Option D

Explanation:

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14.

Tetraethyl lead is used as
A.     pain killer
B.     fire extinguisher
C.     mosquito repellent
D.     petrol additive
Answer & Explanation

Answer: Option D

Explanation:

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15.

Which of the following is used as a lubricant?
A.     Graphite
B.     Silica
C.     Iron Oxide
D.     Diamond
Answer & Explanation

Answer: Option A

Explanation:

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