1) The reaction of zinc with dilute and concentrated nitric acid, respectively, produce A) $NO_{2}$ and $NO$ B) $NO$ and $N_{2}O$ C) $NO_{2}$ and $N_{2}O$ D) $N_{2}O$ and $NO_{2}$ Answer: Option DExplanation:$Zn$ + $4HNO_{3} (conc)\rightarrow$ $Zn (NO_{3})_{2}$ + $2H_{2}O$ + $2NO_{2}$ $4Zn$ + $ 10HNO_{3}\rightarrow$ $4Zn(NO_{3})_{2}$ +$N_{2}O$ + $5H_{2}O$
