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Question

Assertion :Free nitrate ions in solution can be detected by a nitrate ion selective electrode. Reason: Ion selective electrodes function analogously to the pH selective electrode.

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
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Free nitrate ion can be detected by ion selective method. The ion sensitive electrode has a polymer membrane permeable to ion exchange but impermeable to water. It allows sensing cell to contact with solution. As the concentration of ion changing at the sensing electrode voltage changes. Hence can be detected.
It is similar to pH sensitive electrodes in terms of functioning.

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