Which is employed in the softening of hardwater to absorb Ca2+ and Mg2+ ions?
A. Alumina
B. Silica gel
C. Permutit
D. Charcoal
Answer:C
Which is employed in the softening of hardwater to absorb Ca2+ and Mg2+ ions?
A. Alumina B. Silica gel C. Permutit D. Charcoal