Question

In test tubes one 5 gram of zinc dust was taken in test tube two 5 gram of granulated zinc was taken 10 ml of dilute sulphuric acid was added to each test tube identify the gases involved during the reaction and comment on the rate of evolution of gas in both test tube

Answer 1

Hydrogen gas is evolved during both the reactions.
Due to the size of particles of zinc metal the rate of chemical reaction differs.
The reaction where zinc powder is used is very fast whereas the reaction in which granulated zinc is used is comparatively slow.