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JEE CHEMISTRY MCQ: PRACTICAL CHEMISTRY
1
Medium
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Understanding
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When adding the indicator to the conical flask,
only two or three drops are added because
(i) too much indicator may make it difficult
to see the colour change at the end-point
(ii) the indicator is corrosive, and adding too
much poses a greater risk
(iii) the indicator may be a weak acid or base
and may interfere with the titration result.
Which of the above statements is/are correct?
only two or three drops are added because
(i) too much indicator may make it difficult
to see the colour change at the end-point
(ii) the indicator is corrosive, and adding too
much poses a greater risk
(iii) the indicator may be a weak acid or base
and may interfere with the titration result.
Which of the above statements is/are correct?
View answer and explanation
Correct option: C
(iii) only
Option C ((iii) only) is correct because indicators are weak acids or bases and can interfere with the titration result if too much is added.
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