Can you see the oil and water layers separately in both the test tubes.

Can you see it in the water ?

In order to know the substances in the soil, the drained water is heated in the test tube until___________

A mixture of salt and water can be separated by

Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution turn blue.

How can you get half a water molecule ?

In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : What was the colour of lime water in test tubes 'A' and 'B' before you began the experiment ?

In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : In which test tube did the lime water turn milky after you blew in and sucked out air ?

Can you guess the volume of oil ?

In the given picture there is a lime water in A and B test tubes. A boy is breathing out the air into the test tubes. Predict your answers for the following : What difference between inspired and expired air ?

A child staying in a coastal region tests the drinking water and also the sea water with his tester. He finds that compass needle deflects more in the case of sea water. Can you explain the reason?