Add concentrated sulphuric acid to a test tube containing a small quan-tity of carbon. Heat it. What do you observe?

Leave the bottle free. What do you observe?

Take 5mL water in a test tube and slowly add concentrated sulphuric acid to it. Touch the bottom of the test tube. What do you feel? Is the reaction exothermic or endothermic?

Take some sugar in a dry test tube and add a few drops of concentrated sulphuric acid to it. a) Write the chemical formula of sugar b) what is the product obtained after the reaction? c) What are the consitituents of sugar?

A piece of magnesium is burned in air. What do you observe ?

Take water in bucket. Place a tightly closed bottle on it. What do you observe?

Fill half of a beaker of capacity 50 mL with sugar. Add concentrated sulphuric acid so that the sugar is immersed in it. Observe the changes. shat are the products formed? Which property of sulphuric acid is revealed here?

Take 10 mL distilled water in a test tube and take the same volume of hard water in another test tube. Add a few drops of soap solution to both the test tubes and shake well. Do both the test tubes contain the same quantity of foam? Which test tube contains more foam? What do you infer?

The stone tied to a thread is suspending from a spring balance. What do you observe?