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Question -

K[Co(CO)4] में कोबाल्ट (Co) की ऑक्सीकरण संख्या है

  1. +1
  2. +3
  3. – 1
  4. -3



Answer -

3. -1
[+1 + x + 4 × (0) = 0: 
x = – 1 ]

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