JEE Main Chemistry question

The IUPAC name for the complex [Co(NO_2)(NH_3)_5]Cl_2 is **[AIEEE 2006]**

Answer: (D)

Solution

bonded through nitrogen is named "nitrito-N-" (nitro). Oxidation state of Co: $x + (-1) + 5(0) = +2

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Question ID VK-155284