Question

You are conducting the Ammonia Fountain Experiment. You use blue litmus solution to perform the experiment. What will you observe as a result of this experiment?

• A. The solution in the flask turns red
• B. The solution in the flask remains blue
• C. The solution in the flask turns colourless
• D. The solution in the flask turns brown

Answer 1

The correct option is B

The solution in the flask remains blue

We know that Ammonia $N{H}_3$ gas is basic in nature.

We know that Acid turns blue litmus red and bases turn red litmus blue.

Now, since blue litmus solution was being sprayed in the flask.

If there is a base present in the flask, the blue litmus solution shouldn't change colour.

Hence, the solution left behind in the flask is blue and will not change colour in this experiment and if red litmus solution was used the colour of the solution would have turned red.