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Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?

  

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Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?

(a) Sulphur dioxide

(b) Carbon dioxide

(c) Nitrogen dioxide

(d) Tetrachloroethylene

1 Answer
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Correct answer: (d) Tetrachloroethylene

Explanation:

Tetrachloroethylene is widely used for dry cleaning fabrics and metal degreasing operations.

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