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  4. What is the oxidation number of Co in[Co(NH3)4ClNO2]?

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Q. What is the oxidation number of Co in$[Co(NH_{3})_{4}ClNO_{2}]?$

Redox Reactions

Solution:

$[\overset{*}{C}o(NH_{3})_{4} CINO_{2}]$
$x + 4(0) + 1 (-1 ) + 1 (-1) = 0$
$x + 0 -1-1 = 0$
$x - 2 = 0 ; x = +2$