Q.

Which one has the highest and lowest boiling point?

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a

H2O, H2S

b

H2O, H2Se

c

H2S,H2O

d

H2S, H2Se

answer is A.

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Detailed Solution

H2​O will have a higher boiling point due to the presence of H-bond.Among the rest H2​S is having lowest boiling point as H2​Se and H2​Te have higher boiling points than H2​S due to bigger size of Se and Te.
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