Give the characteristic tests for the following gases
(a) CO2
(b) SO2
(c) O2
(d) H2
The characteristic tests are given below:
(a) CO2 : On passing CO2 into limewater, it turns limewater milky.
(b) SO2: The rotten egg smell is the characteristic feature of SO2.
(c) O2: When a glowing splinter is brought near oxygen, it starts burning brightly.
(d) H2: When a burning matchstick is brought near H2 gas, the flame burns with the pop sound.
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