Apparatus: A beaker, potassium permaganate crystals, a burner, water, etc. :
Procedure: Take some water in a beaker. Heat the beaker slowly on a gas burner. Drop a few crystals of potassium permaganate into the water. Now watch the water in the beaker carefully. What do you see?

Take two rubber balloons. Fill one with water and blow air into the other. Now prick both balloons with a pin. What do you observe ?

Apparatus: Beakers. Chemicals: Samples of various metals , water. Procedure: Drop a piece of each of the metal in separate beakers filled with cold water. Which metal floats on water? Why?

Apparatus: Evaporating dish, Bunsen burner, etc. Chemicals: Sugar Procedure: Take some sugar in an evaporating dish and heat it with the help of a Bunsen burner. After some time you will see the formation of a burnt out black substance. Exactly what must have happened in this activity?

Apparatus: Bars of stainless steel, aluminium and copper, a candle, a burner, pins, etc. : Procedure: Take stainless steel (or iron), copper and aluminium bars, each about 30 cm long and having the same shape. Apply wax spots with the help of candle at a distance of 2 cm from each other on all the three bars. Stick a pin in each of these spots so that it is upright. Now insert the ends of all three bars into a flame at the same time. for a while. What do you see? From which bar do the pins start falling first? Why?

Apparatus : Test tube, beakers, burner, etc. Chemicals : Glacial ethanoic acid, ethanol, concentrated sulphuric acid, etc. Procedure : Take 1 mL ethanol and 1 mL glacial ethanoic acid in a test tube. Add a few drops of concentrated sulphuric acid in it. Keeps this test tube in the beaker containing hot water (hot water bath) for five minutes. Then take 20-30 mL water in another beaker, and pour the above reaction mixture in it and smell it. What can you say about the smell of the reaction mixture?

Apparatus: Two test tubes, bent tube, rubber cork, burner, etc. Chemicals: Calcium carbonate, freshly prepared lime water. Procedure: Take some calcium carbonate in a test tube. Fit a bent tube to this test tube with the help of a rubber cork. Insert the other end of the bent tube in the freshly prepared lime water taken in the other test tube. Heat the powdered calcium carbonate in the first test tube strongly. What will you observe?

Take some water in a pot and add few pieces of ice to it . Observe what happens . Why do we see the ice float on water ?