question_answer

Name the gas which is usually produced when dil. sulphuric acid reacts with a metal. Illustrate it with an example. How will you test the evolution of this gas?

Answer:

Metals react with dil. sulphuric acid to give metal sulphates and hydrogen gas.

For example,

\[Zn\left( s \right)+ {{H}_{2}}S{{O}_{4}}\left( aq \right)\to ZnS{{O}_{4}}\left( aq \right)+\underset{ \left( Hydrogen gas \right)}{\mathop{{{H}_{2}}}}\,\uparrow \].

Test for hydrogen gas: Take about 5 ml of dilute sulphuric acid in a test tube and add a few pieces of zinc granules to it. Hydrogen gas is evolved which forms bubbles in the soap solution.

Bring a burning candle near hydrogen gas?filled bubble. It burns with a pop sound..