Question

Give the characteristic test for the following gases: a)CO2 b)SO2 c)H2 d)O2

Answer 1

Characteristic test for the following Gases :

1. CO2 gas :
If CO2 gas is passed to lime water [Conc. Calcium hydroxide solution], it turns milky white.
                           [OR]
As CO2 gas is a best fire extinguisher so, if we bring a burning match stick near the CO2 gas it turns off the burning match stick.

2. SO2:
 Sulphur dioxide is a odorless and pungent gas. 
Test : Sulphur dioxide gas turns acidified potassium dichromate solution from orange to green colour.

3. H2 gas:
If a burning match stick is brought near Hydrogen, the match stick burns with POP sound.

4. O2 gas :
O2 gas is a good supporter of Combustion. So if a burning match stick is brought near the gas it burns more vigorously.

Answer 2

Answer:

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