Assertion :The presence of CO2 in the air accelerates corrosion. Reason: CO2 is a poisonous gas.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution
The correct option is C Assertion is correct but Reason is incorrect The stagnant moisture film on metal surfaces picks up carbon dioxide and becomes aggressive as a dilute acid. This provides an aggressive electrolyte for the promotion of corrosion.
Thus, Assertion is correct but Reason is incorrect