engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test General Science Chemistry Structure of Atom

ग्रेफाइट और चारकोल _____ के अलॉट्रोप हैं?

1
गंधक
2
कार्बन
3
ऑक्सीजन
4
फॉस्फोरस
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