Q.

Most non-volatile hydrides of 16th group and 15th group respectively are

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a

H2O , NH3

b

H2O , BiH3

c

H2O , PH3

d

H2S , PH3

answer is B.

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Detailed Solution

Down the group in hydrides of 16th  &  15th groupVanderwaal's forces become stronger , B.P must increaseBut NH3 of 15th group & H2O of 16th group involve in intermolecular H-bondingThey have abnormal B.Ps
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