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Acidity of Alcohols and Phenols

Which is Inco...

Question

Which is Incorrect statement?

In $C F_{2} = C = C F_{2}$ molecule, all the four fluorine atoms are not in the same plane.

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$K a_{2}$ of fumaric acid is more than $K a_{2}$ of maleic acid due to intramolecular hydrogen bonding in maleic acid.

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The O-O bond length in O2 $[A s F_{4}]$ is longer than $K O_{2} .$

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The bond angle order of halogen-S-halogen is $O S F_{2} < O S C l_{2} < O S B r_{2}$

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Solution

The correct option is C
The O-O bond length in O2 $[A s F_{4}]$ is longer than $K O_{2} .$

As both carbon atoms are in different planes, all the four fluorine atoms are not in the same plane.

$O_{2} [A s F_{4}] = O_{2}^{+}, B . O = 2.5 K O 2 = O_{2}^{-}, B . O = 1.5 B o n d o r d e r \propto \frac{1}{B o n d l e n g t h}$

Greater the size of the halogen atoms, greater will be the repulsion and larger will be the bond angle.

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