Question

What can be tested using a litmus paper?

(a) Acidic nature only

(b) Basic nature only

(c) Both acidic nature and basic nature

(d) Nothing

I have been asked this question during an interview.

Asked question is from Periodic Trends in Properties of Elements in chapter Classification of Elements and Periodicity in Properties of Chemistry – Class 11

Answer 1

Correct answer is (c) Both acidic nature and basic nature

For explanation: A litmus paper is a dye that is extracted from lichens. It used to test acidic nature and basic nature of a substance. Red colour indicates acidic nature and blue colour indicated basic nature. Neutral litmus paper is purple in colour.