Question

why lead can not be used in the preparation of hydrogen dilute acid

Answer 1

heyy!! ,\mate here is ur answer

as becoz it is heavy and it settles down and forms cotting and after sometymes the reaction gets stop so lead is not used in preparation of dilute acid

hope u like it :)

Answer 2

Lead is above hydrogen in the metal activity series ( H2 is included for comparison of reactivity with other metals). So it can displace H from compounds.

In the reactions with acids, insoluble salts of lead are produced which forms a coating on pure lead and prevents the reaction from proceeding further. Thus, Pb is not used to prepare H2.