MCQ
Conc. H2SO4 can be distinguished from dil. H2SO4 by heating each acid with copper turnings :
- ✓SO2 is formed in case of conc. H2SO4, but no action takes place in case of dil. H2SO4
- BSO2 is formed in case of dil. H2SO4, but no action takes place in case of conc. H2SO4
- CSO2 is formed in case of conc. H2SO4, but H2 gas is formed in case of dil. H2SO4
- Dnone of these
