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Environment friendly refrigerant R134a is used in the new generation domestic refrigerators.

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Environment friendly refrigerant R134a is used in the new generation domestic refrigerators. It chemical formula is                                                                                                                                                                                                

      (a) CH ClF2                                                                (b) C2Cl3F3

      (c) C2Cl2F4                                                                 (d) C2H2F4

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