1. How do you confirm the presence of O2 gas in an experiment?
2. NH4Cl + what base gives NH3. Balance the equation 3. What test
detects Na+ ion present in a compound 4. CO2 is colorless and
odorless like O2 and H2. 5. How do you confirm the presence CO2 in
a reaction ? 6. How could you detect the presence of Cl- ion? 7.
How could you detect the presence of SO4 ion? 8. What are the
reactions...