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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.
Solution
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.
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