Question

Consider the following reaction $Zn + 2HCl \to ZnCl_2 + H_2$ If $0.3$ mol of $Zn$ reacts with $0.52$ mol of $HCl$, then which is incorrect regarding above reaction?

• A. $0.26$ mol of $ZnCl_2$ is formed
• B. $5.82 \,L$ of $H_2$ at $STP$ is produced
• C. $HCl$ is limiting reagent
• D. $0.1$ mol of $Zn$ is left

Answer 1

Answer: (D)

$0.1$ mol of $Zn$ is left

Answer 2

$\begin{matrix}&Zn&+&2HCl \to ZnCl_{2} + H_{2}\\\ &1 \,mole&&2\, mole\\\ given&0.3&&0.52\end{matrix}$ $0.3$ mole of $Zn$ require $0.6$ mole of $HCl$ $\therefore$ $HCl$ is the limiting reagent