Question

17. In which of the following substances will there be:
(a) increase in mass (b) decrease in mass
(c) no change in mass when they are exposed to air?
1. Sodium chloride 2. Iron
3. Conc. sulphuric acid 4. Table salt
5. Sodium carbonate crystals​

Answer 1

Answer:

Answer is Conc.sulphuric acid