An element A in a compound ABD has oxidation number \[{{A}^{{{n}^{-}}}}\]. It is oxidised by \[C{{r}_{2}}O_{7}^{2-}\] in acid medium. In the experiment \[1.68\times {{10}^{-3}}\]moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]was used for \[3.26\times {{10}^{-3}}\]moles of ABD. The new oxidation number of A after oxidation is:

An element A in a compound ABD has oxidation number \[{{A}^{{{n}^{-}}}

1.	An element A in a compound ABD has oxidation number \[{{A}^{{{n}^{-}}}}\]. It is oxidised by \[C{{r}_{2}}O_{7}^{2-}\] in acid medium. In the experiment \[1.68\times {{10}^{-3}}\]moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]was used for \[3.26\times {{10}^{-3}}\]moles of ABD. The new oxidation number of A after oxidation is:
A.	3
B.	3-n
C.	n-3
D.
Answer» C. n-3

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