(a) Rehmat classified the reaction between Methane and Chlorine in presence of sunlight as a substitution reaction. Support Rehmat’s view with suitable justification and illustrate the reaction with the help of a balanced chemical equation.
(b) Chlorine gas was prepared using electrolysis of brine solution. Write the chemical equation to represent the change. Identify the other products formed in the process and give one application of each.

Distinguish between esterification and saponification reactions of organic compounds with the help of the chemical equation for each. Write one use of (i) esters and (ii) saponification process?

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.

Write the balanced chemical equations for the following reactions and identify the type of reaction in case. Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

An organic compound 'A' on heating with another compound 'B' in presence of concentrated sulphuric acid forms a sweet smelling compound 'C': (i) Identify the name of this chemical reaction. (ii) Write a balanced chemical equation for the above chemical reaction. (iii) Write one use of compound 'C'. (iv) Write a balanced chemical equation for the reaction when an acid or a base is added to compound 'C'.

No chemical reaction takes place when granules of a rusty brown solid A re mixed with the powder of another solid B. however, when the mixture is heated, a reaction takes place between its components. One of the products C is a metal and settles down in the molten state while the other product D floats over it. it was observed that the reaction is highly exothermic. (a) What could the solids A and B be? (b) What are the products C and D most likely to be? (c) Write the chemical equation for the reaction between A and B leading to the formation of C and D. Mention the physical states of all the reactants and products in this equation and indicate tthe heat change which takes place. (d) What is the special name of such a reaction? State one use of such a reaction. (e) Name any two types of chemical reaction under which the above reaction can be classified.