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The correct order of equilibrium constan...

The correct order of equilibrium constants for the reactions is `H_(2)CO+H_(2)Ooverset(K_1)hArrH_(2)C(OH)_2`
`CH_3CH_2CHO+H_2Ooverset(K_2)hArrCH_3CH_2CH(OH)_2`
`CH_3COCH_3+H_2Ooverset(K_3)hArrCH_3C(OH)_(2)CH_3`

A

`K_1 gt K_2 gt K_3`

B

`K_1 lt K_2 lt K_3`

C

`K_1 gt K_3 gt K_2`

D

`K_1 lt K_3 lt K_2`

Text Solution

Verified by Experts

The correct Answer is:
A
The reactions are known as hydration of C = O group. The bulkier the groups attached to the C , greater is the steric effect, the higher will be the energy during the energy changes in hybrid state and the equilibrium is more likely to lie towards the unhydrated compound. The +I -effect of alkyl groups also decreases the reactivity of C = O towards nucleophilic addition of water. Thus, the trend in equilibrium constants is `K_1 gt K_2 gt K_3`
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