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Reaction of Metals with Acid

Though lead i...

Question

Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilute sulphuric acid. Explain why?

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Solution

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.

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Give reason for the following :

(a) Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilute sulphuric acid.

(b) Potassium and sodium are not used fro reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen.

Q. Give reason for the following:
Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilute sulphuric acid.

Q. Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen. Explain why?

Q. Assertion :Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Reason: Zinc is above hydrogen in reactivity series.

Q. Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why?

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Reaction of Metals with Acid

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