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Which of the following hydride has the lowest BP ?

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$H_{2} O$

$H_{2} S$

$H_{2} S e$

$H_{2} T e$

answer is B.

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Detailed Solution

Following is the order of BP among the given hydrides.

$H_{2} O > H_{2} T e > H_{2} S e > H_{2} S$

The BP of water is higher in spite of having a smaller molar mass. This is due to strong hydrogen bonding.

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