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Answers
Answer:
1.Graphite is a good conductor of heat and electricity. ... Being resistant to chemicals and having a high melting point and also because it is a good conductor of heat, graphite is used to make crucibles.
2.Diamond is used in jewellery because, when cut by experts, it will sparkle and reflect light in an attractive way. Diamond's hardness and high melting point make it useful for cutting tools, such as the diamond-tipped discs used to cut bricks and concrete.
3.Burning coal gives Carbon monoxide and consumes oxygen of the room. Carbon monoxide is a poisonous gas and causes asphyxation.
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Answer:
3 ) we should not sleep in closed room with coal fire as it release carbon dioxide with is dangerous for human
Explanation:
hope it will help u and sorry I don't know above 2 really sorry