Assertion :In the acid-base titration involving strong base and weak acid, methyl red can be used as an indicator. Reason: Methyle red changes its colour in the $p H$ range $4.2$ to $6.3$

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
In the acid-base titration involving strong base and weak acid, phenolphthalein is used as an indicator.

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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