A) \[{{K}_{2}}Cr{{O}_{7}}\]
B) \[{{K}_{2}}Cr{{O}_{5}}\]
C) \[{{K}_{2}}C{{r}_{2}}{{O}_{5}}\]
D) \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
E) None of these
Correct Answer: D
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