Question
A metal $$(M)$$ produces a gas $$(N)$$ on reaction with alkalies like $$NaOH$$ and $$KOH.$$ Same gas is produced when the metal reacts with dilute sulphuric acid. Gas $$(N)$$ reacts with another toxic gas $$(P)$$ to form methanol at high temperature and pressure. $$(N)$$ also reacts with metals like $$(Q)$$ to form electrovalent hydrides. $$M, N, P$$ and $$Q$$ respectively are
A.
$$Zn,{H_2},CO,Na$$
B.
$$Na,{H_2},C{l_2},Ca$$
C.
$$Al,{H_2},{H_2}S,B$$
D.
$$Mg,{H_2},N{O_2},Al$$
Answer :
$$Zn,{H_2},CO,Na$$
Solution :
$$\eqalign{
& \mathop {Zn}\limits_{\left( M \right)} + 2NaOH \to N{a_2}Zn{O_2} + \mathop {{H_2}}\limits_{\left( N \right)} \cr
& Zn + {H_2}S{O_4} \to ZnS{O_4} + {H_2} \cr} $$
\[\underset{\left( P \right)}{\mathop{CO}}\,+2{{H}_{2}}\xrightarrow[Co\,\,\text{catalyst}]{700\,K,\,200\,atm}\] $$C{H_3}OH,\mathop {2Na}\limits_{\left( Q \right)} + {H_2} \to 2NaH$$