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KEAM 2011 Physics and Chemistry Paper
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© examsnet.com
Question : 110
Total: 120
The bonds present in the structure of dichromate ion are
four equivalent Cr-O bonds only
six equivalent Cr-O bonds and one O - O bond
six equivalent Cr-O bonds and one Cr-Cr bond
eight equivalent Cr-O bonds
six equivalent C r-O bonds and one Cr-O-Cr bond
Validate
Solution:
In dichromate ion
(
C
r
2
O
7
2
−
)
two tetrahedral units are shared through an oxygen atom. The two Cr- O bonds which share an oxygen atom are longer than other six equivalent
C
r
−
O
bonds.
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