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Question

N a^{2} o, N a_{2} O_{2}

O_{2}

এ অক্সিজেনের জারণ সংখ্যা যথাক্রমে:

+2, +1, -1

+2,+1, 0

+2, 0, +1

-2, -1, 0

ANS : 4

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