Q.

A chalcogen combines directly with hydrogen to form a hydride but with a great difficulty. On burning in air, this chalcogen forms a solid polymeric dioxide and it also has the highest electrical resistance amongst the metals. This chalcogen is

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a

sulphur

b

selenium

c

polonium

d

tellurium

answer is B.

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Given characteristics are matched for ‘Se’
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A chalcogen combines directly with hydrogen to form a hydride but with a great difficulty. On burning in air, this chalcogen forms a solid polymeric dioxide and it also has the highest electrical resistance amongst the metals. This chalcogen is