Question

If you wanted to know the exact pH of a substance, which of the following indicators would you use ?
Responses

pH paper
pH paper

Digital pH meter
Digital pH meter

Red litmus paper
Red litmus paper

Blue litmus paper
Blue litmus paper

Both A and B

Answer 1

To measure the exact pH of a substance, the best choice would be a **Digital pH meter**.

While pH paper can provide a general indication of pH, and litmus papers (both red and blue) can only determine whether a substance is acidic or basic without giving a precise pH value, a digital pH meter provides an accurate and specific measurement of pH levels.

Therefore, the correct answer is **Digital pH meter**.