Question

tell long answer dont type any useless thing . it is asked for 5 marks so plz give long answer. ​

Answer 1

Answer:  indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

We can perform the litmus test to show the presence of acid in orange juice as follows:

(i) Take some orange juice in a test-tube and add a little water to it.

Explanation:

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