Question

Which among the following statements is INCORRECT for magnesium metal?
(1) It burns in oxygen with a dazzling white flame.
(2) It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
(3) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
(4) It reacts with steam to form magnesium oxide and evolves hydrogen gas.

Answer 1

it reacts with steam to form magnesium

Answer 2

Correct Answer : option 2

" It reacts with cold water to form magnesium oxide and evolves hydrogen gas. :

Explanation :

Metals reacts with water and produces hydrogen gas and metal hydroxides not metal oxides.

Metal +water ----> metal hydroxide +hydrogen gas

example:

Mg+2H2O ----> Mg(OH)2 +2 H2

Thus option 2 is correct