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UPSC CSE Prelims
2006
Q5 — Science & Technology

UPSC CSE Prelims 2006 Q5 — Science & Technology PYQ with Answer

2006Q5·Science & Technology·Chemistry

Consider the following chemicals:

1. Benzene

2. Carbon tetrachloride

3. Sodium carbonate

4. Trichloroethylene

Which of the above is/are used as dry-cleaning chemicals?

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