Choose the incorrect statement(s) among the following:

There are only six conformers for n-butane

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The keto form of acetylacetone in n-hexane is stable than the enol form

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The gauche form of ethylene glycol is more stable

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8 isomers are possible for

C_{4} H_{6}

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Solution

The correct option is D 8 isomers are possible for $C_{4} H_{6}$
a) Infinite number of conformers are possible for n-butane as infinite number of orientation can be possible by rotation about $C - C$ bond.

b) In non-polar solvents like n-hexane enol form of acetylacetone dominates over keto form.

c) The gauche form of ethylene glycol is more stable due to hydrogen bonding.

d) DBU of $C_{4} H_{6}$ is 2. More than 8 isomers are possible for this formula.

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