Which of the following molecule(s) gives only acid(s) or acidic species on hydrolysis?

P C l_{3}

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S F_{4}

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N C l_{3}

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P_{4} O_{6}

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Solution

The correct options are
A $P C l_{3}$
B $S F_{4}$
D $P_{4} O_{6}$
Let us examine the compounds one at a time:
$S F_{4} + 3 H_{2} O ⟶ H_{2} S O_{3} + 4 H F$

$N C l_{3} + 3 H_{2} O ⟶ N H_{3} + 3 H O C l$

$P C l_{3} + 3 H_{2} O ⟶ H_{3} P O_{3} + 3 H C l$

$P_{4} O_{6} + 6 H_{2} O ⟶ 4 H_{3} P O_{3}$

Thus, we rule out hydrolysis of Nitrogen trichloride.

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