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Q. 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?
Answer: 1, 2 and 4 only
Notes: Dry cleaning is a cleaning process for clothing and textiles involves using a chemical solvents other than water. The solvent used is typically Trichloroethylene (4). Historically, Carbon Tetrachloride (2) and Trichloroethane were also used. Benzene (1) is another common agent used for this purpose. However, Sodium Carbonate (3) is not typically used in dry cleaning.

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