Which of the following is/are NOT use(s) of washing soda?
(i) Manufacture of glass, soap and paper
(ii) In soda-acid fire extinguisher
(iii) For removing permanent hardness of water
1
Only i
2
Only ii
3
i and iii
4
Only iii
Which of the following is/are NOT use(s) of washing soda?
(i) Manufacture of glass, soap and paper
(ii) In soda-acid fire extinguisher
(iii) For removing permanent hardness of water