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The stablest among the following is

1. CH3CH(OH)2
2. ClCH2CH(OH)2
3. (CH3)2C(OH)2
4. CCl3CH(OH)2

Correct answer: CCl3CH(OH)2

Solution

The compound CCl3CH(OH)2 is the most stable because the presence of three electronegative chlorine atoms stabilizes the geminal diol through inductive effects, reducing the tendency to lose water and form a carbonyl compound.

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