Q. Which of the following is a use of alum?
A) Making explosives
B) Bleaching clothes
C) Water softening
D) All of these
Explanation
(c)
Alums are used as water-softener. These are also used in tanning of leather, as mordant in dyeing and to stop bleeding.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.