Question

In an experiment to test the pH of a given sample using pH paper, four students recorded the following observations: Sample taken, turned the pH paper colour into

$\begin{array}{cc}\text{I Water}& \text{Blue}\\ \text{II Dilute HCl}& \text{Red}\\ \text{III Dilute NaoH}& \text{Blue}\\ \text{IV Dilute Ethanoic Acid}& \text{Orange}\end{array}$

Which one of the above observations is incorrect?

• A. I 1
• B. II 2
• C. III 3
• D. IV 4

Answer 1

The correct option is

A

I 1

As water used in labs (distilled water) is neutral and hence produces green colour when put on pH paper.