Question

Describe an experiment to show convection currents in liquids???​

Answer 1

Explanation:

On heating the bottom of the flask with a very small gas flame an upward current of colored water will ascend from the place where heat is applied. This colored stream reaches the top and spreads out. After a short time it circulates down the sides of the flask, showing that a convection current has been set up.

Answer 2

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==> Experiment: heating water in a beaker

Procedure:

1. Put water in a beaker until it is three quarters full and place it on a tripod stand.

2. Drop a crystal of potassium permanganate through a tube to settle at one corner at the bottom of the flask.

3. Heat the water gently using a Bunsen burner and observe the movement of streams of colour.

Discussion:

A stream of colour will be seen moving upwards and downwards again at the other side of the beaker. This will continue gradually until all the water becomes coloured. This shows that convectional currents also exist in liquids.

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