A student says acids only turn blue litmus red and show no other chemical property. Which response is correct?
Answer and explanation
Correct answer: The statement is wrong because acids also react with metals, carbonates, and bases
The governing concept is that litmus is only one indicator of acidity, not the complete list of acid properties. Acids can react with active metals to release hydrogen, with carbonates to release carbon dioxide, and with bases in neutralisation reactions to form salt and water. Therefore option A correctly rejects the student’s incomplete claim. Options B and C contradict known reactions and ionisation, while D wrongly says acids are always bases.
Frequently asked questions
What is the correct answer to this question?
The statement is wrong because acids also react with metals, carbonates, and bases
Why is this the correct answer?
The governing concept is that litmus is only one indicator of acidity, not the complete list of acid properties. Acids can react with active metals to release hydrogen, with carbonates to release carbon dioxide, and with bases in neutralisation reactions to form salt and water. Therefore option A correctly rejects the student’s incomplete claim. Options B and C contradict known reactions and ionisation, while D wrongly says acids are always bases.
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.
