E-PolyLearning

11. Bromine is a
a. black solid
b. red liquid
c. colourless gas
d. highly inflammable gas
View Answer Report Discuss 50-50!
Answer: (b).red liquid

12. The hardest substance available on earth is
a. Gold
b. Iron
c. Diamond
d. Platinum
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Answer: (c).Diamond

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
View Answer Report Discuss 50-50!
Answer: (d).peat

14. Tetraethyl lead is used as
a. pain killer
b. fire extinguisher
c. mosquito repellent
d. petrol additive
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Answer: (d).petrol additive

15. Which of the following is used as a lubricant?
a. Graphite
b. Silica
c. Iron Oxide
d. Diamond
View Answer Report Discuss 50-50!
Answer: (a).Graphite

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