Steps involved in the Frasch process are given below. Arrange them in the correct sequence ,
Three melts the sulphur below melting point
The sulphur foam formed rises in the middle pipe and is collected.
Surerheated steam under pressure is sent through the outermost pipe
Hot compressed air is sent through the innermost pipe , which froth up the molten sulphur below
Three concentric pipes are drilled through the ground to the sulphur deposits
A. e c a d b
B. e a d c b
C. e a d b c
D. e d a c b
