Question

05. Give reasons:

a. Lead even if above hydrogen in the activity series, it does not react
with dilute hydrochloric acid.
b. Potissium and sodium are not used for reaction with dilute hydrochloric
acid in the laboratory preparation of hydrogen.​

Answer 1

Answer:

The surface of metallic lead is protected by a thin layer of lead oxide PbO. This renders the lead essentially insoluble in sulfuric acid. Lead reacts slowly with hydrochloric acid and nitric acid.

since both sodium and potassium are very reactive metals therefore when their reaction takes place with dilute hydrochloric acid or dilute sulphuric acid, they react vigorously and releases large amount of heat, which can be harmful

Explanation:

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