1.

The colour of the pH paper strip turned red when it was dipped into a sample. The sample could be :(1) dilute sodium bicarbonate solution(2) tap water (3) dilute sodium hydroxide solution (4) dilute hydrochloric acid

Answer» The colour of the pH paper strip turned red when it was dipped into a sample. The sample could be :

(1) dilute sodium bicarbonate solution

(2) tap water

(3) dilute sodium hydroxide solution

(4) dilute hydrochloric acid


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