Which of the following is the strongest base?

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(A) The strength of a base is inversely proportional to the strength of its conjugate acid.$1$. The conjugate acids of the given bases are: $C_2H_6$ (

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$C_2H_5^-$

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(A) The strength of a base is inversely proportional to the strength of its conjugate acid.$1$. The conjugate acids of the given bases are: $C_2H_6$ (for $C_2H_5^-$),$C_2H_5COOH$ (for $C_2H_5COO^-$),$C_2H_5OH$ (for $C_2H_5O^-$),and $H_2O$ (for $OH^-$).$2$. The order of acidity of these conjugate acids is: $C_2H_5COOH > C_2H_5OH > H_2O > C_2H_6$.$3$. Since $C_2H_6$ is the weakest acid,its conjugate base $C_2H_5^-$ is the strongest base.

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