About \[6\times {{10}^{-3}}\] mol \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] reacts completely with \[9\times {{10}^{-3}}\] mol \[{{X}^{n+}}\] to give \[X{{O}^{-}}_{3}\] and \[C{{r}^{3+}}\]. The value of \[n\] is:

About \[6\times {{10}^{-3}}\] mol \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] rea

1.	About \[6\times {{10}^{-3}}\] mol \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] reacts completely with \[9\times {{10}^{-3}}\] mol \[{{X}^{n+}}\] to give \[X{{O}^{-}}_{3}\] and \[C{{r}^{3+}}\]. The value of \[n\] is:
A.	1
B.	2
C.	3
D.	none of these
Answer» B. 2

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About \[6\times {{10}^{-3}}\] mol \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] reacts completely with \[9\times {{10}^{-3}}\] mol \[{{X}^{n+}}\] to give \[X{{O}^{-}}_{3}\] and \[C{{r}^{3+}}\]. The value of \[n\] is:

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