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?

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

Take a few sodium carbonate in a test tube and let it react with dilute sulphuric acid. The gas formed is passed through lime water. What do you observe? Which gas is formed? Write the chemical equation.

Take 25 ml water in a beaker and the pass electricity through it. Then add little sulphuric acid in it: Complete the equation

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?