A) 11 non-metals are in gaseous state.
B) Gas carbon is a good conductor of heat and electricity.
C) The black material inside a pencil is metal lead.
D) All non-metals are non-sonorous in nature.
Correct Answer: C
Solution :
The black material inside a pencil is not metal lead. Actually it is graphite, a non-metal.You need to login to perform this action.
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