A)
X Y Z Coal gas Coal tar Coke
B)
X Y Z Coal gas Coke Coal
C)
X Y Z Coal gas Coal tar Impure coal
D)
X Y Z Carbon dioxide Coal tar Coal
Correct Answer: A
Solution :
In destructive distillation of coal, finely powdered coal taken in a test tube is heated. Coal tar (Y) gets collected at the bottom of the second test tube and coal gas (X) escapes out through the side tube. The black residue left in the first tube is called coke (Z).
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