Assertion :In the acid-base titration involving a strong base and a weak acid, methyl orange can be used as an indicator Reason: Methyl orange changes its colour in $p H$ range $3 t o 5.$
Read the above assertion and reason and choose the correct option regarding it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
A weak acid will react with a strong base to form a basic ( $p H > 7$ ) solution.
Phenolphthalein is a suitable indicator for this titration. Methyl orange is not suitable for this titration because its pH range lies on the flat portion of the curve.

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