A drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be :
(1)dilute hydrochloric acid (2)dilute sodium hydroxide solution
(3) distilled water (4)sodium bicarbonate solution

Correct answer: (1) dilute hydrochloric acid

Explanation: Bases turn red litmus to blue and acids turn blue litmus to red. Hence, dilute hydrochloric acid will turn blue litmus to red.

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Updated on: 10-Oct-2022

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(1)dilute hydrochloric acid	(2)dilute sodium hydroxide solution
(3) distilled water	(4)sodium bicarbonate solution

A drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be :(1)dilute hydrochloric acid(2)dilute sodium hydroxide solution(3) distilled water(4)sodium bicarbonate solution