A metal which does not react with cold water but reacts with steam to liberate H2 gas is

Question

A metal which does not react with cold water but reacts with steam to liberate H2 gas is (A) Na (B) Mg (C) Au (D) Fe

Tardigrade Admin · Accepted Answer

Na reacts with cold water, Mg reacts with hot water, Fe reacts with steam and Au does not react with water. 3Fe + underset text(steam)4H2Oarrow Fe3O3 +4H2 uparrow

Q. A metal which does not react with cold water but reacts with steam to liberate $H_{2}$ gas is

$N a$

$M g$

$A u$

$F e$

$N a$ reacts with cold water, $M g$ reacts with hot water, $F e$ reacts with steam and $A u$ does not react with water.
$3 F e + (steam) 4 H_{2} O \to F e_{3} O_{3} + 4 H_{2} ↑$

Q. A metal which does not react with cold water but reacts with steam to liberate H2​ gas is

Na

Mg

Au

Fe