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Question

C r (O H)_{3}

এ Chromium , Oxygen এবং Hydrogen এর জারণ সংখ্যা যথাক্রমে কোনগুলো ?

+ 3 , -2 + 1

+1 , -1, 0

-3 , + 1, -2

-1 , + 1, 0

ANS : 1

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