A) \[C{{l}_{2}}C=CC{{l}_{2}}\]
B) Liquid \[C{{O}_{2}}\]
C) \[{{H}_{2}}{{O}_{2}}\]
D) None of these
Correct Answer: B
Solution :
[b] Replacement of earlier used tetra- chloroethene as solvent for dry cleaning by liquid \[C{{O}_{2}}\] results in less harm to ground water.
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