railway RRB Group D Mock Test Series 2024-25 General Science Chemistry States of Matter

खालीलपैकी कोणता वायू इलेक्ट्रिक बल्बमध्ये वापरला जातो?

1
हॅलोजन
2
नायट्रोजन
3
कार्बन डाय ऑक्साइड
4
हायड्रोजन
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