railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry

क्लोरोफ्लोरो कार्बन मोठ्या प्रमाणावर वापरले जातात:

1
सोलर हीटर्स
2
रेफ्रिजरेटर्स
3
वॉशिंग मशीन
4
मायक्रोओव्हन्स
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