Question

Match List – I with List – II and select  the correct answer using the code given below the lists

                        List – I (Designation of refrigerant)               List – II (Chemical formula & name)

            A. R – 11                                                        1. SO₂ - Sulphur Dioxide

            B. R – 12                                                         2. CHF₂CI – Difluoro Dichloro Monochloro Methane

            C. R – 22                                                         3.  CF₂CI₂ -  Difluoro Dichloro Methane

            D. R – 764                                                      4. CFCI₃ – Monofluoro Trichloro

            Codes:

                        A         B         C         D

            (a)        1          3          2          4

            (b)        4          3          2          1

            (c)        1          2          3          4

            (d)       4          2          3          1