Question

Why does the red litmus paper turn blue when touched with aqueous solution of magnesium oxide? ​

Answer 1

The aqueous solution of magnesium oxide is called magnesium hydrogen which is an alkali. The red litmus turns blue when it comes in contact with an alkali.

Answer 2

➠ AnSwer :-

➝ The litmus paper is used as an indicator to determine the pH of the substance that is being tested.

➝ The red litmus indicates that the solution is acidic in nature.

➝ The red litmus turns blue when the solution is basic in nature.

➝ The aqueous magnesium oxide is basic in nature and when the red litmus paper was dipped into the solution then it became blue.