Question

Oxide of magnesium is basic in nature because:

• A. When Magnesium oxide is dissolved in water then resulting solution is a base which does not change the colour of red litmus paper.
• B. When Magnesium oxide is dissolved in water then resulting solution is a base which turns red litmus to blue.
• C. When Magnesium oxide is dissolved in water then resulting solution is a base which turns blue litmus to red.
• D. When Magnesium oxide is dissolved in water then resulting solution has no action on dry red litmus paper.

Answer 1

The correct option is B

When Magnesium oxide is dissolved in water then resulting solution is a base which turns red litmus to blue.

Oxide of magnesium is basic in nature becausewhen magnesium oxide is dissolved in water then resulting solution is basic in nature due to the presence of Mg(OH)2 which turns red litmus to blue.

MgO + H2O →Mg(OH)2