Question

S1: The oil found in the natural state is called crude oil.
S6: Last of all, the lubricating oils of various grades are produced.
P: It is used as a fuel in heaters and lamps.
Q: It is treated in refineries, the most common form of treatment is heating.
R: Gas that comes off the oil later is condensed into paraffin.
S: When crude oil is heated, the first vapours to rise are cooled and become the finest petrol.
The proper sequence should be:

• A. QSPR
• B. SPQR
• C. SQRP
• D. QSRP

Answer 1

The correct option is D QSRP

The first statement in the sequence should be the one that best connects with S1. It must be a continuation or extension of S1.

Q is first in the sequence: S1 says that the oil found in the natural state is called crude oil. Q continues S1's point. It says that the crude oil is treated in refineries and the most common of these treatments is heating.

Q is followed by S: S continues Q's point. It says that after heating the first vapours to rise are cooled and become the finest petrol.

S is followed by R: R adds to S that the gas that comes after the petrol is condensed into paraffin.

R is followed by P: P tells us that this paraffin is used as fuel in heaters and lamps. S6 concludes by saying that last of all, the lubricating oils of various grades are produced.

Thus, the correct sequence is Q S R P. Hence, D is the correct option.