Which of the acid is required for the laboratory preparation of nitric acid?

Sodium nitrate or potassium nitrate and concentrated sulphuric acid

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Sodium nitrite or potassium nitrite and dilute sulphuric acid

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Sodium nitrate or potassium nitrite and concentrated hydrochloric acid

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Sodium nitrate or potassium nitrite and dilute hydrochloric acid

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Solution

The correct option is A
Sodium nitrate or potassium nitrate and concentrated sulphuric acid

Nitric acid is produced in the laboratory by heating potassium nitrate and concentrated sulphuric acid.
$K N O_{3} + H_{2} S O_{4} \to K H S O_{4} + H N O_{3}$
Nitric acid is a volatile acid. In order to displace it from a salt, a non-volatile salt like concentrated sulphuric acid is used.

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Similar questions

Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.

On warming with potassium nitrite, dilute hydrochloric acid gives _____.

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.

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