(i) Name the gas which is liberated when an acid reacts with a metal. How will you test the presence of the gas. (ii) Write the chemical equations for the reaction for zinc metal with : (a) Hydrogen acid and (b) Sodium hydroxide Write the chemical name of salt obtained in each case.

(i) Name the gas which is liberated when an acid reacts with a metal.

1.	(i) Name the gas which is liberated when an acid reacts with a metal. How will you test the presence of the gas. (ii) Write the chemical equations for the reaction for zinc metal with : (a) Hydrogen acid and (b) Sodium hydroxide Write the chemical name of salt obtained in each case.
Answer» SOLUTION :(i) Hydrogen gas: When a burning matchstick is brought near the hydrogen gas , it burns with a pop sound. (ii) (a) `Zn(s)+2HCl to ZnCl_2(AQ)+H_2(G)` Zinc chloride (b) `Zn(s)+NAOH to Na_2ZnO_2+H_2(g)` Sodium zincate