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1 question · 2006 · answers as per the UPSC key

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UPSC 2006 · Q5 · Science & Technology › Chemistry · Save

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?

(a) 1 only
(b) 2 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4
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Answer: (c) 1, 2 and 4 only