## Question

###### A metal $(M)$ produces a gas $(N)$ on reaction with alkalies like $mathrm{NaOH}$ and $mathrm{KOH}$. 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) $mathrm{Zn}, mathrm{H}_{2}, mathrm{CO}, mathrm{Na}$(b) $mathrm{Na}, mathrm{H}_{2}, mathrm{Cl}_{2}, mathrm{Ca}$(c) $mathr

A metal $(M)$ produces a gas $(N)$ on reaction with alkalies like $mathrm{NaOH}$ and $mathrm{KOH}$. 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) $mathrm{Zn}, mathrm{H}_{2}, mathrm{CO}, mathrm{Na}$ (b) $mathrm{Na}, mathrm{H}_{2}, mathrm{Cl}_{2}, mathrm{Ca}$ (c) $mathrm{Al}, mathrm{H}_{2}, mathrm{H}_{2} mathrm{~S}, mathrm{~B}$ (d) $mathrm{Mg}, mathrm{H}_{2}, mathrm{NO}_{2}, mathrm{Al}$

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