Question

When lead ($Pb$) is reacted with the hydrochloric acid a gas is evolved. Name the gas.
A.Hydrogen gas
B.Chlorine gas
C.Both hydrogen and chlorine gas
D.None of them

Answer 1

Reaction of acid and metal results in the formation of salt and hydrogen, whereas salt produced depends on the acid used. The hydrogen is released in the process as the metals are above hydrogen in the activity series.

Complete step by step answer:

Reaction of lead with hydrochloric acid leads to the formation of lead chloride and hydrogen gas. The gas produced in the form of bubbles. The chemical equation for the above reaction is given as:
$Pb(s) + 2HCl \to PbC{l_2}(aq) + {H_2}(g)$
The process of reaction of hydrochloric acid and lead is very slow and a very small amount of gas is produced. The $PbC{l_2}$ produced is insoluble and forms a layer around the lead ($Pb$) and effectively stops the reaction.
Hence the correct answer is Option A.

Additional Information: Lead is available in group 14 of the periodic table. It is highly malleable, ductile and corrosion resistant. They are usually unreactive to acids and due to its insoluble nature in sulphuric acid, lead containers were once used to store the acid. Also, the symbol ($Pb$) is an abbreviation of Latin word Plumbum.

Note:
Lead lies in mid of the series in terms of reactivity and its reaction with other acids can be shown as below:
Lead does not ready reacts with oxygen
Lead reacts vigorously with Fluorine and chlorine at room temperature.
A layer of Lead Oxide ($PbO$) is available on the metallic lead and due to this it is insoluble in sulphuric acid
Lead also reacts slowly with Nitric acid ($HN{O_3}$)