engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Refrigeration and Air Conditioning Refrigerants Designation of Refrigerants

R1211 के रूप में नामित प्रशीतक के लिए रासायनिक सूत्र क्या है?

1
CHFCl3
2
C3HFCl2
3
C3FCl5
4
C2F2CI2
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