Question

. Read the following statements carefully: X: It is a thick black coloured liquid which is obtained from coal.Y: It was used earlier in railway engines to produce steam to run trains.Z : It is used to run heavy vehicles such as buses, trucks, tractors, etc.X, Y and Z respectively are : * Coal tar b. Coal c. Diesel Coal b. Paraffin wax c. Petrol Coke b. Coal tar c. Kerosene Coke b. Coal c. Coal tar

Answer 1

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X is Coal tar, also known as bitumen

Y: Coal was used to produce heat and to form steam

Z: It is diesel

Answer 2

Answer:

The option is (a) a. Coal tar b. Coal c. Diesel correct.

Explanation:

Substance X - It is coal tar, a thick, black, unpleasant-smelling liquid obtained during the destructive distillation of coal. Coal tar is made up of several different components.

Substance Y - It is coal. They were used in railway engines, back in the day, to produce steam when they are burned, heating the water.

Substance Z - It is diesel, used as a fuel in buses, trucks, and tractors. It has very high energy, and is less volatile.

Conclusion:

The substances X, Y and Z are- Coal tar, Coal and Diesel.