What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?

(a) methyl orange


(b) litmus


(c) red cabbage extract

(a) Methyl orange- It is a synthetic indicator of orange color. Turns yellow with base or alkali.

(b) Litmus- A base turns red litmus paper into blue.


(c) Red cabbage extract- Originally purple in color. Turns greenish with base or alkali.


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