Take two test tubes, one filled with water and one with kerosene. Now add a spoon of salt in both and stir. You will observe that in the first test tube the salt dissolves completely and in the second test tube it does not dissolve which of the following is being tested using above experiment.
Answers
Answer:
Collect samples of sugar, salt, chalk powder and sand. Take four beakers. Fill each one of them about two-third with water. Add a teaspoonful of sugar to the first beaker, salt to the second, chalk powder to the third and sand to the fourth. Stir the contents of each beaker with a spoon/stirrer. Wait for a few minutes and observe what happens to the substances added to the water.
Note down your observations in the following table.
Table: Mixing different solid materials in water
S. No. Substance Disappears in water / does not disappear
1. Sugar Disappears completely in water
2. Salt Disappears completely in water
3. Chalk powder Does not disappear in water
4. Sand Does not disappear in water
Inference: (i) Sugar and salt are soluble in water.
(ii) Chalk powder and sand are insoluble in water.