Which of the following molecules is/are linear?

I {C l}_{2}^{-}

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I F_{2}^{+}

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O F_{2}

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C d B r_{2}

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Solution

The correct options are
B $I {C l}_{2}^{-}$
D $C d B r_{2}$
In $I C l_{2}^{-}$ , I form sigma bonds and have three lone pair, it's hybridisation is sp $_{3} d$ in which lone pairs are placed in equatorial position and sigma bonds are formed along with axial position which gives it linear structure.

In $C d B r_{2}$ , Cd forms 2 sigma bonds and have 0 lone pair, it's hybridisation is sp and thus is linear in shape.

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