Question

Which of the following salts when dissolved in water will form a solution that will change blue litmus to red?

A. CH3COONa
B. NH4Cl
C. NaCl
D. KCl​

Answer 1

B. NH4Cl

Step-by-step explanation:

When NH4Cl is dissolved in water, it hydrolyzes to give HCl and NH4OH

NH4Cl + H2O = HCl + NH4OH

NH4OH is a weak base.

HCl is a strong acid which changes blue litmus to red.