The reaction of SO 2 with PCl 5 yield two oxohalides A and …

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) General Single Correct MCQ

Published on: August 14, 2026

The reaction of SO 2 with PCl 5 yield two oxohalides A and B. ‘A’ can also be prepared industrially by reaction of SO 3 and SCl 2 . Which of the following about A and B is incorrect ?

The structure of B is tetrahedral

The structure of A is trigonal pyramidal

A reacts vigorously with water and is particularly useful for drying or dehydrating readily hydrolysable inorganic halides

A and B contain their respective central atoms in their highest oxidation states.

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The correct answer is:

SO 2 + PCl 5 ⎯→ SOCl 2 + POCl 3

SO 3 + SCl 2 ⎯→ SOCl 2 + SO 2

⎯→ sp 3 hybridization, terahedral

⎯→ sp 3 hybridization, pyranidal (trigonal)

6SOCl 2 + MgCl 2 .6H 2 O ⎯→ MgCl 2 + 6SO 2 + I2HCl

SOCl 2 ⎯→ O.N. of S = + 4 (not highest)

POCl 3 ⎯→ O.N. of P = + 5 (highest)

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