Question

The degree of dissociation of benzoic acid, salicylic acid and 2, 6 di-hydroxy benzoic acid are given for compounds, it will be found that the degree of dissociation of:

• A. benzoic acid is the minimum
• B. salicylic acid is the highest
• C. 2, 4 dihydroxy benzoic acid is the highest
• D. 2, 6 dihydoxy benzoic acid is roughly equal to benzoic acid

Answer 1

The correct option is A benzoic acid is the minimum

Benzoic Acid: (Refer to image 01)

Degree of dissociation $=2$

$\left(C_6{H}_{5}CO{O}^{-}\right)$ and $\left(H^{+}\right)$

Salicylic Acid: (Refer to image 02)

Degree of dissociation $=3$

$2H^{+}$ions and salicylic ion.

2,4-dihydroxybenzoic acid (Refer to image 03)

Degree of disociation $=4$

$(3H^{+}$ ions and 2,4-dihydroxybenzoate ions $)$