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Arrange the carbanions, `(CH_(3))_(3)bar(C),bar(C)Cl_(3),(CH_(3))_(2)bar(C)H,C_(6)H_(5)bar(C)H_(2)`, in order of their decreasing stability
A. `C_(6)H_(5)bar(C)H_(2)gtbar(C) Cl_(3)gt(CH_(3))_(3)bar(C)gt(CH_(3))_(3)bar(C)gt(CH_(3))_(2)bar(C)H`
B. `(CH_(3))_(2)bar(C)Hgtbar(C)Cl_(3)gtC_(6)H_(5)bar(C)H_(2)gt(CH_(3))_(3)bar(C)`
C. `bar(C)Cl_(3)gtC_(6)H_(5)bar(C)H_(2)gt(CH_(3))_(2)bar(C)Hgt(CH_(3))_(3)bar(C)`
D. `bar(C)Cl_(3)gtC_(6)H_(5)bar(C)H_(2)gt(CH_(3))_(2)bar(C)Hgt(CH_(3))_(3)bar(C)`

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1 Answers

Correct Answer - C
Presence of electron withdrawing groups stabilised the carbanions. Thus, the order of stability is
`overset(-)C Cl_(3)gt C_(6)H_(5) overset(-)C H_(2) gt (CH_(3))_(2) overset(-)C H gt (CH_(3))_(3) overset(-)C`

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