Name a non-metallic element which
(a) forms acidic and neutral oxides
(b) has a metallic lustre
(c) is a liquid at ordinary temperatures
(d) is a conductor of electricity

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Solution

(a) Nitrogen forms an acidic oxide ( ${NO}_{2}$ ) and a neutral oxide (NO).
(b) Iodine has a metallic lustre.
(c) Bromine remains in the liquid state at ordinary temperatures.
(d) Graphite, an allotrope of carbon, is a conductor of electricity.

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