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Question

(CH3)3CCH2COOH is more acidic than (CH3)3SiCH2COOH because

A
Size of Si is more than that of carbon
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B
Electronegativity of carbon is less than that of silicon
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C
Silicon is more electropositive than carbon due to which (CH3)3SiCH2COO becomes less stable
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D
None of the above
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Solution

The correct option is C Silicon is more electropositive than carbon due to which (CH3)3SiCH2COO becomes less stable
The conjugate base of both acid are CH3CH3|C|CH3CH2C||OO

CH3CH3|Si|CH3CH2C||OO
Silicon is more electropositive than carbon due to which conjugate base ((CH3)3SiCH2COO) becomes less stable and hence less acidic.

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