A drop of colourless liquid is poured over blue litmus paper and it turns to red. The colourless liquid is:

dilute hydrochloric acid

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potassium hydroxide solution

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sodium chloride solution

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pure water

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Solution

The correct option is A
dilute hydrochloric acid

Acids turn blue litmus to red hence dilute hydrochloric acid turns blue litmus paper red.

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Similar questions

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

A colourless liquid turns blue litmus paper into red and reacts with magnesium to produce a gas. What is the colourless liquid ?

Q. What do we observe on pouring acetic acid on red blue litmus papers ?
(a) Red litmus remains red and blue litmus turns red.
(b) Red litmus turns blue and blue litmus remains blue.
(c) Red litmus turns blue and blue litmus turns red.
(d) Red litmus becomes colourless and blue litmus remains blue.

Q. Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.

a) What is universal indicator .

b) What is the chemical equation involved in the preparation of sodium hydroxide. Name the process.

c) Give reason for; Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric.

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A drop of colourless liquid is poured over blue litmus paper and it turns to red. The colourless liquid is:

The correct option is A dilute hydrochloric acidAcids turn blue litmus to red hence dilute hydrochloric acid turns blue litmus paper red.

The correct option is A
dilute hydrochloric acid

Acids turn blue litmus to red hence dilute hydrochloric acid turns blue litmus paper red.