What happens when a cold and concentrated solution of sodium chloride reacts with ammonia and carbon dioxide? Write the chemical equation of the reaction which takes place.

What happens when an acid reacts with a metal hydrogencarbonate? Write equation of the reaction which takes place.

(a) What happens when an aqueous solutin of sodium sulphate reacts with an aqueous solution of barium chloride ? (b) Write the balanced chemical equation for the reactin which takes place. (c ) State the physical conditions of reactants in which the reactin will not take place. (d) Name the type of chemical reactio which occurs. (e) Give one example of another reaction which of the same type as the above reaction.

State what happens when a concentrated solution of sodium chloride (brine) is electrolysed ? Name the process. Write the equation of the reaction involved. Write the names of product obtained. Mention one use of each product.

When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming a product Y.A suspension of Y in water is applies to the walls of a house during white washing. A clear solution of Y is also used for testing carbon dioxide gas in the laboratory. (a) What could be solid X? Write its chemical formula. (b) What could be product Y ? Write its chemical formula. (c ) What is the common name of the solution of Y which is used for testing carbon dioxide gas? (d) Write chemical equation of the reaction which takes place on adding water to solid X. (e) Which characteristic of chemical reactions is illustrated by this example ?

(a). What happens when concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved. (b) Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process? (c) Name three products of the chlor-alkali process. State two uses of each of these products.

What happens when silver nitrate solution is added to sodium chloride solution ? (a) Write the equation for he reaction which takes place. (b) Name the type of reaction involved.

What happen when KO_2 reacts with water ? Write the balance chemical equation for the reaction.