Question

which of the following cannot be used as an indicator ? 1. turmeric 2. onion 3. suger 4. beetroot​

Answer 1

Answer:

sugar

Explanation:

turmeric turns red in base and the onions and betroot also have changes in acid and base. But sugar is acid

Answer 2

Option 3 is correct

3. suger

An indicator is a chemical substance that is used to determine the nature of any given material; for example, we may tell whether a substance is an acid or a base by using an indicator.

Indicators generally display distinct color and odor effects in the presence of an acid and in the presence of a base, which is not their normal behavior. All of the aforementioned alternatives are examples of natural indicators in the provided question, and they demonstrate the following effects in acidic and basic solutions:

-Turmeric in aqueous form has a natural yellow hue in both acidic and neutral solutions, but becomes red when exposed to a basic solution.

-Onion is also known as an olfactory indicator, since it changes its scent or odor to indicate acidity or basicity. In the basic medium, the onion loses its odor.

Because all of the chemicals are employed as indicators, only one choice is accurate in terms of the question's statement.