Which among the following is NOT a use of sodium hydroxide?
(i) Used in making soaps and detergents.
(ii) Used in the manufacture of paper.
(iii) Used for removing permanent hardness of water.
1
Only iii
2
Only ii
3
Both ii and iii
4
Only i
Which among the following is NOT a use of sodium hydroxide?
(i) Used in making soaps and detergents.
(ii) Used in the manufacture of paper.
(iii) Used for removing permanent hardness of water.