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Question

Amongst H2O, H2S, H2Se and H2Te and the one with the highest boiling point is

A
because of hydrogen bonding
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B
because of higher molecular weight
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C
because of hydrogen bonding
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D
because of lower molecular weight
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Solution

The correct option is A because of hydrogen bonding

Oxygen due to its small size and more electro negativity than other members of Group 16, tends to form 4 hydrogen bonds per water molecule. Thus to due to strong hydrogen bonding, its boiling point is higher.


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