Question

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

there will be no change in option 1, 2 ,4 and 5
and there will be a decrease in mass in conc. Sulphuric acid


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Answer 2

Increase in mass-iron and conc. Sulfuric acid

Decrease in mass-sodium carbonate crystals

No change in mass when exposed to air-sodium chloride and table salt.