How concentrated sulphuric acid is diluted in the laboratory?

The wooden cupboards in which concentrated sulphuric acid is often seen charred. Why?

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?

How do you account for the following observations? a) Though alkaline potassium permanganate and acidic potassium permanganate both are used as oxidants, yet in the manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. Why? Write a balanced redox equation for the reaction. b) When concentrated- sulphuric acid is added to an inorganic mixture containing chloride, we get colourless pungent smelling gas 'HCl', but if the mixture contains bromide, then we get red vapours of bromine. Why?

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?

Why is concentrated sulphuric acid not used as a drying agent in the preparation of ammonia?

Hot concentrated sulphuric acid is a strong oxidising agent. Why?

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?