Practical Work

Test for hydrogen (H₂):

• A burning wooden splint when brought near this gas gets off and burns with a pale blue flame producing a pop sound. 

Test for oxygen (O₂):

• A burning wooden splint when brought near this gas re-lights brightly which shows that it is a supporter of combustion. 

Test for water vapour (H₂O):

• It turns anhydrous copper sulphate to blue.
• It turns blue copper chloride to pink.

Test for ammonia (NH₃):

• Dense white fumes are formed when a rod dipped in HCl is brought near this gas. 

Test for carbon dioxide (…