question_answer

                                                                        What is called as Black Gold and why? Write any three uses of this product.    

Answer:

(a) Petroleum and its derivatives are called as 'black gold? because they are very valuable.

(b) The main uses of petroleum are:

(i) It forms a base for petro-chemical industries.

(ii) It is largely used for automobiles.

(iii) It provides fuel for heat and lighting, lubricants for machinery and raw-material for a number of manufacturing industries.