Which of the following correctly represents the rate of acid-catalysed hydration?

III > I > II > IV

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IV > III > I > II

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I > II > III > IV

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IV > III > II > I

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Solution

The correct option is C I > II > III > IV
Rate of acid catalysed hydrolysis depends on the stability of carbocation.
Rate of acid catalysed hydrolysis $\propto$ statibility of carbocation

5 $α$ Hydrogens, Extended conjugation.

2 $α$ Hydrogens, Extented conjugation.

2 $α$ hydrogens, No extended conjugation.

9 $α$ Hydrogens, No resonance.

Comaparing all the stabilities of the above given structures based on their effects
I > II > III > IV

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2-phenyl propene

The product of acid catalysed hydration of 2-phenyl properties is:

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	5 $α$ Hydrogens, Extended conjugation.
	2 $α$ Hydrogens, Extented conjugation.
	2 $α$ hydrogens, No extended conjugation.
	9 $α$ Hydrogens, No resonance.