Most acidic is:

Question

Most acidic is: (A)  CH3COOH  (B)  C6H5COOH  (C)  HCOOH  (D)  CH3CH2COOH

Tardigrade Admin · Accepted Answer

H +donors are acids. Electron donating groups increase acidity and electron withdrawing groups decrease acidity. In C H 3 C O O H and CH 3 CH 2 COOH: Alkyl groups donate electrons towards O-H group due to +I effect and increases the bond strength of C - H bond. ∴ Acidity is decreased. In C 6 H 5 COOH: Phenyl group attracts the electrons away from benzene ring and hence, O-H bond strength decreases and therefore acidity increases. HCOOH: It has neither +I or -I effect. So its acidity is not affected. ∴ C 6 H 5 COOH is most acidic.

Q. Most acidic is:

$C H_{3} COO H$

$C_{6} H_{5} COO H$

$H COO H$

$C H_{3} C H_{2} COO H$

Q. Most acidic is:

CH3​COOH

C6​H5​COOH

HCOOH

CH3​CH2​COOH

$C H_{3} COO H$

$C_{6} H_{5} COO H$

$H COO H$

$C H_{3} C H_{2} COO H$