Question

Assertion: \[\ce{NaCl}\] reacts with concentrated \[\ce{H2SO4}\] to give colourless fumes with pungent smell. But on adding \[\ce{MnO2}\] the fumes become greenish yellow.

Reason: \[\ce{MnO2}\] oxidises \[\ce{HCl}\] to chlorine gas which is greenish yellow.

Options

• Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.

• Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.

• Assertion is correct, but reason is wrong statement.

• Assertion is wrong but reason is correct statement.

• Both assertion and reason are wrong statements.

Answer 1

Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.

Explanation:

When \[\ce{NaCl}\] reacts with concentrated \[\ce{H2SO4}\], it produces colourless fumes with a pungent smell, but when \[\ce{MnO2}\] is added, the fumes turn greenish yellow. \[\ce{MnO2}\] oxidizes \[\ce{HCl}\] to chlorine gas, which then turns greenish yellow.