Which of the following metals reacts only with steam and gives H 2 but not with H 2 O at room temperature-

Question

Which of the following metals reacts only with steam and gives H 2 ​ but not with H 2 ​ O at room temperature-

TestHub · Accepted Answer

Reactivity of metals with water depends on their position in the reactivity series.

Li and Na react with cold water:

$2 N a + 2 H_{2} O \to 2 N a O H + H_{2}$

Mg reacts slowly with hot water/steam, while Fe does not react with water at room temperature.

Iron reacts only with steam:

$3 F e + 4 H_{2} O (g) \to F e_{3} O_{4} + 4 H_{2}$

Therefore, the correct answer is:

(D) Fe

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