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:
No answer description available for this question.