engineering recuitment ONGC AEE Mechanical Mock Test 2025 Refrigeration and Air Conditioning Refrigerants Designation of Refrigerants

प्रशीतक R11 का रासायनिक सूत्र क्या है?

1
CClF3
2
CCl3F
3
CHF
4
CClHF
5
CHClF2
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