When the strip of pH paper was put in a given solution, the pH paper changed to orange red. The given solution is most likely to be of :
(1) sodium hydroxide
(2) hydrochloric acid
(3) sodium bicarbonate
(4) ethanoic acid

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Solution

Acids turn blue litmus to red. So, among the given options, hydrochloric acid and acetic acid are two acids. But hydrochloric acid is a strong acid it will give red colour on pH paper and acetic acid is a weak acid it gives orange-red colour on pH paper.

Hence, the correct answer is option 4.

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Similar questions

Q. 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

Q. A colourless liquid sample was tested with pH paper strip. The colour of the strip changed to reddish pink. The sample could be :
(1) tap water
(2) sodium hydroxide solution
(3) distilled water
(4) ethanoic acid 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

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the
colour obtained? (You may use colour guide given in your text book)

Q.
Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed on the pH paper. What would be the colour obtained?

(a) Red
(b) Yellow
(c) Yellowish green
(d) Blue

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When the strip of pH paper was put in a given solution, the pH paper changed to orange red. The given solution is most likely to be of : (1) sodium hydroxide (2) hydrochloric acid (3) sodium bicarbonate (4) ethanoic acid

Acids turn blue litmus to red. So, among the given options, hydrochloric acid and acetic acid are two acids. But hydrochloric acid is a strong acid it will give red colour on pH paper and acetic acid is a weak acid it gives orange-red colour on pH paper. Hence, the correct answer is option 4.

When the strip of pH paper was put in a given solution, the pH paper changed to orange red. The given solution is most likely to be of :
(1) sodium hydroxide
(2) hydrochloric acid
(3) sodium bicarbonate
(4) ethanoic acid

Acids turn blue litmus to red. So, among the given options, hydrochloric acid and acetic acid are two acids. But hydrochloric acid is a strong acid it will give red colour on pH paper and acetic acid is a weak acid it gives orange-red colour on pH paper.

Hence, the correct answer is option 4.