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JEE Advanced levelSingle correct optionDifficulty 3 of 3cb031

Assertion (A): $ICl X_{4} X^{-}$ is square planar. Reason (R): The central iodine atom in $ICl X_{4} X^{-}$ has four bond pairs and no lone pair.

ABoth A and R are true and R is the correct explanation of A
BBoth A and R are true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true

Answer: C

Iodine in

ICl X_{4} X^{-}

has

(7 + 4 + 1) /2 = 6

electron pairs: 4 bond pairs and 2 lone pairs. The lone pairs sit trans to each other, so the ion is square planar. A is true but R is false.

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