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Question
Which of the following can be used as a solvent in dry cleaning?
Options:
A .  Water
B .  Coal gas
C .  Coal Tar
D .  Petroleum
Answer: Option D
:
D
Petroleum is used as a solvent in dry cleaning industry due to its high degreasing ability, i.e., it can easily remove stains from clothes. It is one among the three commonly used solvents used in this industry and has been used since ancient times.

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