The correct order of decreasing Lewis acid strength of trichlorides of group 15 elements is :

A s C l_{3} > P C l_{3} > B i C l_{3} > S b C l_{3}

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P C l_{3} > A s C l_{3} > S b C l_{3} > B i C l_{3}

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N C l_{3} > P C l_{3} > A s C l_{3} > S b C l_{3}

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S b C l_{3} > B i C l_{3} > P C l_{3} > A s C l_{3}

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Solution

The correct option is B $P C l_{3} > A s C l_{3} > S b C l_{3} > B i C l_{3}$
$P C l_{3} > A s C l_{3} > S b C l_{3} > B i C l_{3}$
Size of central atom increases electronegativity decreases.

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From the following, no. of compounds which do not hydrolyze

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