Question

Y is formed when X is heated in the absence of air, Y is
tough, porous and a black substance. X and Y are carbon.
rich materials. What could X and Y be ?
(A) X = Coal, Y = Coke (B) X = Petroleum, Y = Petrol
(C) X = Coal, Y = Coal tar (D) X = Petroleum, Y = Diesel​

Answer 1

Explanation:

answer is A and you do pratical also for this