When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is used in the hydrogenation of oils. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.

When zinc metal is treated with a dilute solution of a strong acid, a

1.	When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is used in the hydrogenation of oils. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.
Answer» Solution :The gas EVOLVED is hydrogen gas which is used in the hydrogenation of oil to produce Vanaspati. The EQUATION of the REACTION is given as under `Zn + 2HCl rarr ZnCl_2+H_2` Hydrogen gas BURNS with a pop SOUND. `2H_2 + O_2 rarr 2H_2O`