(a) Name the gas which is liberated when an acid reacts with a metal ? How will you test the presence of this gas ? (b) Write the chemical equation for the reaction of zinc metal with (i) Hydrochloric acid and (ii) With sodium hydroxide. Write the chemical name of salt obtained in each case. (c) Identify the acid and base for ammonium chloride salt. What would be the nature of this salt ? mention the pH range of this salt.

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

1.	(a) Name the gas which is liberated when an acid reacts with a metal ? How will you test the presence of this gas ? (b) Write the chemical equation for the reaction of zinc metal with (i) Hydrochloric acid and (ii) With sodium hydroxide. Write the chemical name of salt obtained in each case. (c) Identify the acid and base for ammonium chloride salt. What would be the nature of this salt ? mention the pH range of this salt.
Answer» Solution :(a) `H_(2)` GAS this gas burns with a pop sound. (b) (i) `Zn +2HCl to underset("Zinc chloride")(ZnCl_(2)) +H_(2) uarr` (II) `Zn +2NAOH to underset("Sodium zincate")(Na_(2)ZnO_(2))+H_(2) uarr` (c) Acid is hydrochloric acid (HCl), base is ammonium hydroxide `(NH_(4)OH)`. this salt is acidic salt as it is a salt of strong acid and a weak base, pH of this salt lt7.