The dand fblock elements - Result Question 45

####45. In acidic medium, H2O2 changes Cr2O72 to CrO5 which has two (OO) bonds. Oxidation state of Cr in CrO5 is:-

(a) +5

(b) +3

(c) +6

(d) -10

[2014]

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Solution:

  1. (c) The structure of CrO5 is

Hence, CrO5 has two proxy linkage.

Now suppose the oxi. no. of Cr is x then x+(1×4)+(2)=0

x=+6



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