Question

When Magnesium oxide is dissolve in water then-

(a) Magnesium is formed

(b) Magnesium hydroxide is formed

(c) Magnesium chloride is formed

(d) Magnesium sulphate is formed​

Answer 1

Answer:

(b) Magnesium hydroxide is formed

Explanation:

Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to remove moisture.

Answer 2

Answer:

When Mg(OH)2 is dissolved in H2O (water) it will dissociate (dissolve) into Mg +2 and OH- ions.