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Consider the following acids (1) CH_(3) COOH ""(2) Cl_(2) CHCOOH (3) ClCH_(2)COOH""(4) Cl_(3)C COOH The correct sequence of acidity is

Answer»

`1 gt 4 gt 3 gt 2`
` 1 gt 3 gt 2 gt 4`
` 1 gt 2 gt 3 gt 4`
` 4 gt 2 gt 3 gt 1`

Solution :Inductive effect diminishes with increases in the number of `sigma`- bonds through which the effect operates. This MAKES `ClCH_(2)COOH` more ACIDIC than `ClCH_(2)CH_(2)COOH`. An electronegative atom Cl is an electron withdrawing group and acid strengthener.
THEREFORE, `ClCH_(2)COOH` is a stronger acid than `CH_(3)COOH` . Two chlorine atoms are more electron withdrawing than single Cl atom. So, `Cl_(2)CHCOOH` stronger acid than `ClCH_(2)COOH`.


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