Ans. We can obtain a fountain of ammonia
gas in the following manner.
1.
Ammonia gas is highly soluble
in water. A test tube is filled with ammonia gas.
2.
A Jet Tube is fixed with test
tube using a rubber cork.
3.
Red litmus solution is taken in
the beaker.
4.
The test tube is fixed to a
stand and the open end of the jet tube is inserted in the litmus solution.
5.
Red litmus solution is sucked
in the test tube, since ammonia is a colourless basic gas and hence it turns
red litmus solution blue, hence blue fountain is formed.
