Question

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 1

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

For example,
$Zn\left(s\right)+H_{2}S{O}_4\left(aq\right)\to ZnS{O}_4\left(aq\right)+H_2\uparrow$

Test for hydrogen gas : Take about 5 m1 of dilute sulphuric acid in a test tube and add a few pieces of zinc granules to it. Hydrogen gas is evolved during this reaction. Now bring a burning candle near the hydrogen gas-filled test tube. It will put off with a pop sound.