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Physical Properties of Ammonia

Why is the re...

Question

Why is the reaction between pottasium and dilute acids not used to prepare hydrogen gas in the laboratory ?

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Solution

The reaction between potassium and dilute acids will burst as reaction of potassium with water is dangerous. It may cause fire and can explode.

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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. Give a reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.

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. (i) Name the acid used for the preparation of hydrogen chloride gas in the laboratory. Why is this particular acid preferred to other acids?
(ii) Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

Q. The reaction between marble and dilute

H_{2} S O_{4}

is not used to prepare carbon dioxide for laboratory purpose.
Answer whether the above statement is true or false.

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