Question

A metal X reacts with water to produce a highly combustible gas Y, and a solution Z. Another metal P reacts with Z to give the same gas Y.

X,Y, Z and P respectively are.

• A. $Zn,H_{2},Zn(OH)_{2},Al$
• B. $Na,H_{2},NaOH,Zn$
• C. $K,H_{2},KOH,Al$
• D. $Li,H_{2}LiOH,K$

Answer 1

Answer: (B)

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

Answer 2

: $\underset{(X)}{Na} + H_{2}O \rightarrow \underset{(Z)}{NaOH} + \underset{(Y)}{H_{2}}$

$\underset{(Z)}{NaOH} + \underset{(p)}{Zn} \rightarrow Na_{2}ZnO_{2} + \underset{(Y)}{H_{2}}$