Question

A metal (M) Produces a gas (N) on reaction with alkalis like NaOH and KOH. Same gas is produced when the metal reacts with dilute ssulphuric 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, $H_{2},Cl_{2},Ca$
• C. $Al,H_{2},H_{2}S,B$
• D. $Mg,H_{2},NO_{2},Al$

Answer 1

Answer: (A)

Zn, $H_{2},CO,Na$

Answer 2

: $\underset{(M)}{Zn} + 2MaOH \rightarrow Na_{2}ZnO_{2} + \underset{(N)}{N_{2}}$

$Zn + H_{2}SO_{4} \rightarrow ZnSO_{4} + H_{2}$

$\underset{(P)}{CO} + 2H_{2}\underset{CoCataust}{\overset{\quad 700K,200atm\quad}{\rightarrow}}CH_{3}OH$

$2\underset{(Q)}{Na} + H_{2} \rightarrow 2NaH$