Non-metals are usually poor conductors of heat and electricity. They are non-lustrous,non-sonorous,non-malleable,and are coloured.
$(a)$ Name a lustrous non-metal.
$(b)$ Name a non-metal which exists as a liquid at room temperature.
$(c)$ The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
$(d)$ Name a non-metal which is known to form the largest number of compounds.
$(e)$ Name a non-metal other than carbon which shows allotropy.
$(f)$ Name a non-metal which is required for combustion.

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(N/A) Iodine is a lustrous non-metal.
$(b)$ Bromine is the only non-metal that exists as a liquid at room temperature.
$(c)$ Graphite is an allotrope of carbon and is a good conductor of electricity due to the presence of free electrons.
$(d)$ Carbon is known to form the largest number of compounds due to its unique property of catenation.
$(e)$ Sulphur and phosphorus are non-metals other than carbon that exhibit allotropy.
$(f)$ Oxygen is a non-metal essential for the process of combustion.

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