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Question

Assertion: Rusting of Fe is quicker in saline water than in ordinary water.
Reason: Presence of Na+ and Cl ions increase the conductance of the saline water.

A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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B
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
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C
Assertion is true but Reason is false
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D
Assertion is false but Reason is true
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E
Both Assertion and Reason are false
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Solution

The correct option is C Both Assertion and Reason are true and Reason is the correct explanation of Assertion
The Na and Cl present in saline water increase the conductance of the solution in contact with the metal surface. This accelerates the formation of Fe2+ ions and hence that of rust, Fe2O3xH2O

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