Question

=which one of the following has lowest acidity? ​

Answer 1

Answer:

option 3 is correct answer

Answer 2

Answer:

the option (d) para-methoxy benzoic acid.

Explanation:

• Eletron withdrawing group increases the acidity, for exmpl:

        -$NO_{2},-CHO,-Cl ,...etc$. These also possess the, -$I$effect.

• Electron donating group decreases the acidity, for exmpl:

         $-NH_{2},-OH,-OR,-R...etc$.These also posses the, $+ I$effect.

∴ the lowest acidty compound is option (d) para-methoxybexoic acid, due to having an electron donating group & +$I$ effect.