Question

Q11. Give the characteristic tests for the following gases
1) co2
2) o2
3) h2​

Answer 1

Answer:

co2=carbon dioxide

O2=oxygen

h2= hydrogen

Answer 2

Answer:

CO2 gas : If CO2 gas is passed to lime water [Conc. Calcium hydroxide solution], it turns milky white.

c) Test for O2 gas When a wooden splinter is brought near the mouth of the gas jar containing oxygen gas, it burns brightly as oxygen is the supporter of combustion. (d) Test for K, gas Hydrogen gas burns in the presence of air or oxygen with a pop sound when a burning candle is brought near it.

H2: Bring a burning splinter near the mouth of the test tube containing reaction mixture. Hydrogen gas, if present, will burn with pop sound