Question

Alum is used as a coagulant

• A. True
• B. False

Answer 1

The correct option is A True

Step 1 Understanding the concept: An Alum is a double hydrated salt of potassium and aluminum with the general formula of ${\mathrm{K}}_2{\mathrm{SO}}_4.{\mathrm{Al}}_2{\mathrm{SO}}_4.24{\mathrm{H}}_2\mathrm{O}$.

Step 2 Uses of Alum: In water treatment, alum is most commonly used as a coagulant.

Coagulants are used to expand the size of impurities so that they would settle in sedimentation tanks.

Alum can also be used to kill germs that are present in the water. Alum is used as a coagulant.

Thus, Alum is used as a coagulant is a true statement.