The substance that has the lowest boiling point is:

H C l

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H_{2} S

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P H_{3}

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S i H_{4}

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Solution

The correct option is C $S i H_{4}$
$S i H_{4}$ has a lowest boiling point of 161 K.
$H_{2} S$ boiling point 216 K.
$H C l$ boiling point 188 K.
$P H_{3}$ boiling point 185 K.

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