engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test General Science Chemistry Chemical Reaction

धातूंची विरल आम्लांबरोबर अभिक्रिया होऊन _______ वायू मुक्त होतो.

1
हायड्रोजन 
2
क्लोरिन 
3
नायट्रोजन 
4
ऑक्सिजन 
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