Why is
(a) concentrated sulphuric acid kept in air tight bottles ?

Concentrated sulphuric acid is:

Why is hot concentrated sulphuric acid not used in the preparation of hydrogen ?

Nitric acid may be kept in a bottle of :

Explain the following : Why concentrated sulphuric acid is always added to water and not the water to concentrated sulphuric acid? Why the mixture gets hot ?

In the Contact process state why sulphur trioxide vapours are absorbed in concentrated sulphuric acid and not in water to obtain sulphuric acid .

A. Sodium sulphite and dilute sulphuric acid. B. Sodium chloride and concentrated sulphuric acid. C. Potassium nitrate and concentrated sulphuric acid. D. Oleum and water : Which of the above pairs are used in the laboratory preparation/manufacture of :

Phenol, when it first react with concentrated sulphuric acid and with concentrated nitric acid, gives

What happens when hot and concentrated sulphuric acid reacts with the following: Sugar

What happens when hot and concentrated sulphuric acid reacts with the following: Carbon

Explain the following : Why the wooden shelves on which concentrated sulphuric acid bottles are kept stained black ?