Set 2: Words in Context (Intermediate)

Explanation

Answer: B

PASSAGE

The chemist needed to ______ the solution to remove impurities, a process that required precise temperature control and filtration.

Which choice completes the text with the most logical and precise word or phrase?

A. pollute

B. refine✓ Correct

C. disperse

D. solidify

Detailed Explanation

Removing impurities is the definition of 'refining'. To refine is to remove impurities or unwanted elements from (a substance).

Key Evidence:

• "remove impurities"

• "filtration"

Why others are wrong: A (Pollute means to add impurities.), C (Disperse means to scatter.), D (Solidify means to make hard.).