• # question_answer Zn gives hydrogen gas with ${{H}_{2}}S{{O}_{4}}$and $HCl$ but not with $HN{{O}_{3}}$ because [CBSE PMT 2002] A) $N{{O}_{2}}$is reduced in preference to ${{H}_{3}}{{O}^{+}}$B) $HN{{O}_{3}}$is weaker acid than ${{H}_{2}}S{{O}_{4}}$ and $HCl$C) $Zn$acts as oxidising agent when reacts with $HN{{O}_{3}}$D) In electrochemical series $Zn$is placed above the hydrogen

$4Zn+10HN{{O}_{3}}\to 4Z{{(N{{O}_{3}})}_{2}}+N{{H}_{4}}N{{O}_{3}}+3{{H}_{2}}O$