Metals react with acids to produce _______ gas.
Correct the following statements :
(a) Hydrogen is used as a fuel for rocket propulsion.
(b) All metals react with acids to give hydrogen.
(c) Metals adsorb hydrogen.
(d) Very dilute nitric acid reacts with zinc to produce hydrogen.
(e) Conc.H2SO4 reacts with zinc to liberate hydrogen.
A metal reacts with dilute Hydrochloric acid to produce a gas. What is used to identify this gas?