Question

Give the characteristic test of the following gases co2 so2 o2 h2

Answer 1

to test co2 mix it with lime water . lime water will turn milky .
to test so2 as we know it is brown in colour as and has unpleasant odour .
to test o2 bring match stick near the mouth of test tube . it will support combustion .
to test h2 bring match stick near the mouth of test tube it will create pop sound.