What will be the increasing trend of acidic character in C6H5COOH, CH3COOH, HCOOH, XCOOH, XCH3COOH, XC2H5COOH and C(Cl3)COOH.

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Q. Based on

p K_{a}

values the order of decreasing acidity of carboxylic acid molecules containing EWG must be?

C F_{3} C O O H, C C l_{3} C O O H, H C C l_{2} C O O H, N O_{2} C H_{2} C O O H, F C H_{2} C O O H, C l C H_{2} C O O H, B r C H_{2} C O O H, H C O O H, C l C H_{2} C H_{2} C O O H, C_{6} H_{5} C O O H, C_{6} H_{5} C H_{2} C O O H, C H_{3} C O O H, C H_{3} C H_{2} C O O H

Q. In

C H_{3} C O O H

and

C_{2} H_{5} C O O H

which is more acidic?

Q. For the compounds,
I) HCOOH II)

C H_{3} C O O H

III)

C H_{3} C H_{2} C O O H

IV)

C_{6} H_{5} C O O H

The correct order of decreasing acidity is :

The heats of neutralisation of $C H_{3} C O O H$ , HCOOH, HCN and $H_{2} S$ are -12.8, -13.2, -3.2 and -3.9 kcal per equivalent. Arrange these acids in increasing order of strength.

Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. $Δ_{H} h y d r o g e n a t i o n$ helps to calculate resonance energy.

The heat of neutralization of $C H_{3} C O O H, H C O O H, H C N$ and $H_{2} S$ are -12.8, -13.2, -3.2 and -3.9 Kcal per equivalent. Arrange these acids in increasing order of strength.

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