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Q.

A non- metal which has metallic luster is

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a

Silicon

b

Sulphur

c

Iodine

d

Phosphorus

answer is B.

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Detailed Solution

Iodine is a non-metal. Non-metals are non-lustrous except iodine.  Crystals of iodine have bright its luster property.

Iodine is large sized atom. The electron which are present into valency shell gets excited when they absorb energy. Due to excitation and de-excitation, it exhibits lustrous property. 

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