Which of the following has the lowest boiling point: (a)H2O (b)H2S (c)H2Se (d)H2Te

Q. Which of the following has the lowest boiling point:
(a)H2O
(b)H2S
(c)H2Se
(d)H2Te

Answer: (b)H2S
H2S (boiling point increases down the group but water forms strong hydrogen bonds so
has higher boiling point than H2S)

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