1.

The correct order of acidity is

Answer»

`C_6H_5COOH GT HCOOH gt CH_3COOH`
`HCOOH gt C_6H_5COOH gt CH_3COOH`
`C_6H_5COOH gt CH_3COOH gt HCOOH`
`HCOOH gt CH_3COOH gt C_6H_5COOH`

SOLUTION :More the number of electron donating GROUPS attached to the compound , lesser will be the acidic STRENGTH
Acidic NATURE : `HCOOH gt C_6H_5COOH gt CH_3COOH`
`pK_a : 3.75"" 4.2 "" 4.76`


Discussion

No Comment Found