Question

Arrange the following in decreasing order of their acidic character.
a. Vinegar
b. Stomach acid
c. Soap solution
d. Lime water
Select the alternative which indicates the correct order.

• A. b, a, d, c
• B. c, d, a, b
• C. b, a, c, d
• D. d, c, a, b

Answer 1

Answer: (C)

b, a, c, d

Vinegar is an aqueous solution of acetic acid ($C{H}_{3}COOH$). Acetic acid is a weak acid as it does not dissociate completely in aqueous solution. Acid present in a stomach is $HCl$ it is strong acid as it gets completely dissociated in aqueous solution. Soap solution contains $NaOH$ whereas lime water is aqueous solution of $Ca(OH{)}_2$. Lime water is a stronger base in comparison to soap solution.