Question

Metals like .......... , ........... and .......... give $H_2$ with steam.

• A. iron
• B. magnesium
• C. aluminium
• D. sodium
• E. calcium
• F. none of the above

Answer 1

Answer: (A), (B), (C)

iron
magnesium
aluminium

Metals which react with steam to give $H_2$ gas are Iron, Magnesium and Aluminium.

Magnesium ribbon reacts with steam to give Magnesium oxide and Hydrogen gas.

$Mg$ $+$ $H_{2}O$ $=$ $MgO$ $+$ $H_2$

Aluminium reacts with steam to give Aluminium Oxide and Hydrogen gas. But the reaction takes place very slowly, as a layer of Aluminium Oxide forms on the metal.

$2Al$ $+$ $3H_{2}O$ $=$ $A{l}_2{O}_3$ $+$ $3H_2$

Iron does not react with cold water. It reacts with steam to form Ferric Oxide and hydrogen gas.

$3Fe$ $+$ $4H_{2}O$ $=$ $F{e}_3{O}_4$ $+$ $4H_2$

Thus, options A, B and C are correct.