A) +8
B) +6
C) +4
D) +10
Correct Answer: B
Solution :
Key Idea The structure of \[Cr{{O}_{5}}\] is In \[Cr{{O}_{5}}\] four oxygen atoms are present as peroxide (oxidation number-1) while the fifth is present as oxide (oxidation number -2 ). Let the oxidation number of Cr is x in \[Cr{{O}_{5}}\]. \[\therefore \] \[x+4(-1)+1(-2)=0\] \[x-4-2=0\] \[x=+6\]You need to login to perform this action.
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