If a solution does not change either red or blue litmus, which test can give more clarity?
Answer and explanation
Correct answer: Checking pH with universal indicator
Red and blue litmus provide only a broad classification and may show little or no change for a nearly neutral solution or a weak substance. A universal indicator gives a range of colours corresponding to approximate pH values, so it provides more information. Option A is correct. Tasting, rubbing, or putting an unknown solution in the eye is unsafe and scientifically invalid.
Frequently asked questions
What is the correct answer to this question?
Checking pH with universal indicator
Why is this the correct answer?
Red and blue litmus provide only a broad classification and may show little or no change for a nearly neutral solution or a weak substance. A universal indicator gives a range of colours corresponding to approximate pH values, so it provides more information. Option A is correct. Tasting, rubbing, or putting an unknown solution in the eye is unsafe and scientifically invalid.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
