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Types of Redox Reactions

Starch is use...

Question

Starch is used as a best indicator in iodometric titration because :

it easily forms a complex with iodine

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it is readily available

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it is non-toxic

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all of these

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Solution

The correct option is D all of these
Iodometry, also known as iodometric titration, is a method of volumetric chemical analysis, a redox titration where the appearance or disappearance of elementary iodine indicates the end point.

The indicator that is usually chosen for titrations involving iodine is starch. Starch forms a dark blue complex with iodine. The end point in iodimetry corresponds to a sudden color change to blue.
Also It is can be freshly prepared and is non toxic in nature. Hence, starch is used as an indicator in iodometric titration.

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