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Which of the following equations is not correctly formulated ?

$\begin {array} {1 1} (A)\;4Zn+10HNO_3(dilute) \rightarrow 4Zn(NO_3)_2+N_2O+5H_2O \\ (B)\;3Zn+8HNO_3(dilute) \rightarrow 3Zn(NO_3)_2+2N_2O+4H_2O \\ (C)\;6Hg+8HNO_3(dilute) \rightarrow 3Hg_2(NO_3)_2+2N_2O+4H_2O \\ (D)\;Zn+2OH^-+2H_2O \rightarrow [Zn(OH)_4]^{2-}+H^2 \end {array}$

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Answer : $3Zn+8HNO_3 \rightarrow 3Zn(NO_3)_2+2N_2O+4H_2O $
$ \qquad \: \qquad \: \qquad ( \text{dilute})$
$4Zn+10HNO_3 \rightarrow 4Zn(NO_3)_2+N_2O+5H_2O $
$ \quad \qquad ( \text{dilute})$
answered Aug 1, 2014 by thanvigandhi_1

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