iran-konkur 2022 Q215

iran-konkur · Other · konkur-riazi_1401_specialized Not Maths
215. Regarding the reaction: $\mathrm{12H_3PO_4(aq) + NO(g) \rightarrow aP_4(s) + bHNO_3(aq) + cH_2O(l)}$, after fully balancing the equation, how many of the following statements are correct?
  • The ratio $c$ to $b$ equals $0.4$.
  • It has several active anions in it.
  • The oxidation number of the oxygen atom does not change in it.
  • The stoichiometric coefficient of one of the reactants equals the stoichiometric coefficient of one of the products.
  • The change in oxidation number of every oxidizing species multiplied by its coefficient equals the stoichiometric coefficient of one of the reactants.

(1) two (2) three (3) four (4) five
\textbf{215.} Regarding the reaction: $\mathrm{12H_3PO_4(aq) + NO(g) \rightarrow aP_4(s) + bHNO_3(aq) + cH_2O(l)}$, after fully balancing the equation, how many of the following statements are correct?

\begin{itemize}
\item The ratio $c$ to $b$ equals $0.4$.
\item It has several active anions in it.
\item The oxidation number of the oxygen atom does not change in it.
\item The stoichiometric coefficient of one of the reactants equals the stoichiometric coefficient of one of the products.
\item The change in oxidation number of every oxidizing species multiplied by its coefficient equals the stoichiometric coefficient of one of the reactants.
\end{itemize}

(1) two \hspace{1cm} (2) three \hspace{1cm} (3) four \hspace{1cm} (4) five