Question

The colors of the pH paper strips corresponding to pH 1, 7, 13 will be:

• A. Green, red and violet
• B. Red, green and violet
• C. Violet, green and red
• D. Green, violet and red

Answer 1

The correct option is B

Red, green and violet

A pH paper is a type of indicator that is used to determine the value of pH in a solution. It changes its color according to the pH of the solution.

1. If the pH value is from 1 to 3 => red colour.
2. if pH value is from 4 to 6 => yellowish orange.
3. If pH value is from 7 => green.
4. If pH value is from 8 to 11 => bluish purple.
5. if pH value is from 11 to 14 => violet.

Therefore only option B represents the correct matching of pH values with their colours.

Hence, the correct option is (B).