When litmus is added to a solution of borax, it turns ________.

Correct option is A

The correct answer is (a) Blue.
Key Points:
· Borax, when dissolved in water, forms a basic (alkaline) solution.
· Litmus paper or solution is a pH indicator that turns blue in the presence of a basic solution.
· Therefore, when litmus is added to a solution of borax, it turns blue, indicating the basic nature of the solution.
Information Booster:
· Orange: Typically, litmus does not turn orange. This color might be associated with a different type of pH indicator like methyl orange.
· Red: Litmus turns red in acidic solutions.
· Pink: Similar to red, pink is a color seen in acidic solutions when using other pH indicators.