Question

Look at Figure which shows solutions taken in test tubes A, B, C and D. What color is expected when a piece of red litmus paper is dropped in each test tube? Nature of the solutions is given in the table for your help.

(A) (B) (C) (D) Milk in water \( \begin{array}{cc}\text { Baking powder } & \text { Vinegar } \\ \text { in water } & \text { in water }\end{array} \) Glucose in water

Answer 1

Red Litmus paper:-

1. Litmus is actually a water-soluble mixture of different dyes that is extracted from lichens.
2. Basically Red litmus paper is used for indicating alkalinity with a change in color to blue and generally litmus paper is red only below pH of 4.5

Test Tube	Nature of Solution	Change in Color of Red litmus
A	Neutral	No Change
B	Basic	Turns blue
C	Acidic	No Change
D	Neutral	No Change