Question

What is the oxidation number of Co in$[Co(N{H}_3{)}_{4}ClN{O}_2]?$

• A. $+5$
• B. $+3$
• C. $+4$
• D. $+2$

Answer 1

Answer: (D)

$[\stackrel{\ast }{C}o(N{H}_3{)}_{4}CIN{O}_2]$
$x+4(0)+1(-1)+1(-1)=0$
$x+0-1-1=0$
$x-2=0;x=+2$