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

Correct answer: (4) 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.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

216 Views

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
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
A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :(1) dilute hydrochloric acid (2) dilute sodium hydroxide(3)water(4)dilute acetic acid"
No observable change is noticed when dilute hydrochloric acid is added to :(1)sodium hydroxide solution(2)sodium carbonate solution(3) blue litmus solution(4) zinc metal
Name the gas produced when aluminium foil reacts with:(a) dilute hydrochloric acid.(b) Sodium Hydroxide solution.
Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip:
A drop of a liquid sample was put on the pH paper. It was observed that the colour of the pH paper turned blue. The liquid sample islemon juicesodium bicarbonate solutiondistilled waterhydrochloric acid
A colourless liquid sample was tested with pH paper strip. The colour of the strip changed to reddish pink. The sample could be :
The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution iscopperironaluminiumsodium
A student mixed equal volumes of hydrochloric acid and sodium hydroxide solution of same concentrations in a beaker and tested the pH of the resulting mixture with a pH paper. What will be the colour of pH paper in this case?(1) (2) yellow (3) green (4) blue
Name the gas evolved when zinc granules are treated/heated with:(a) Hydrochloric acid solution(b) Sodium hydroxide solution
(a) What happens when dilute hydrochloric acid is added to sodium carbonate? Write balanced equation of the reaction involved.(b) Which gas is liberated when dilute hydrochloric acid reacts with sodium carbonate? How will you test for the presence of this gas?
Which of the following will be required to identify the gas evolved when dilute hydrochloric acid reacts with zinc metal?(a) Red litmus paper(b) pH paper(c) Lime water(d) A burning splinter
How can a solution be dilute or concentrated?

Kickstart Your Career

Get certified by completing the course

Get Started

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

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

Kickstart Your Career

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