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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ph081

Which of the following statements about the preparation and properties of interhalogens and polyhalides are correct?

AInterhalogen compounds are paramagnetic.
B $IF X_{7}$ can be prepared from $IF X_{5}$ and $F X_{2}$ .
C $ICl$ accepts $Cl X^{-}$ to give the linear ion $ICl X_{2} X^{-}$ .
D $ClF X_{3}$ can be prepared from $Cl X_{2}$ and $F X_{2}$ (about 573 K).

Answer: B, C, D

Cl X_{2} + 3 F X_{2} 2 ClF X_{3}

at about 573 K and

IF X_{5} + F X_{2} IF X_{7}

are standard preparations.

ICl + Cl X^{-} ICl X_{2} X^{-}

gives a linear ion (2 bond pairs, 3 lone pairs). All interhalogens have only paired electrons and are diamagnetic, so the last statement is wrong.

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