Question

A metal in the powdered form reacts very slowly with the boiling water, but it decomposes steam.
Name the metal.​

Answer 1

Magnesium reacts slowly with boiling water and form magnesium hydroxide along with liberation of hydrogen gas. ​ That is,​ ​

$Mg+2H_{2}O\left(hot\right)\to Mg(OH{)}_2+H_2$

While Magnesium reacts with steam to form magnesium oxide and liberates hydrogen gas.​

​$Mg+H_{2}O\left(steam\right)\to MgO+H_2$​

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