Chemistry-18-Important Non-Metals

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1.
Which of the following is the correct term used to describe Graphite, Carbon and Diamonds?
2.
Which of the following is not a common use of Graphite?
3.
In a photochemical smog, which gas causes irritation to mucous membrane and respiratory system?
4.
Which of the following chemicals is also known as lachrymatory agent or lachrymator? 
5.
Which of the following chemicals is also known as “Chinese snow”?

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