In a solution red litmus turns blue and turmeric becomes reddish-brown. What is the nature of the solution?
Answer and explanation
Correct answer: Basic
The governing concept is the characteristic response of acid–base indicators. A basic solution changes red litmus to blue, and turmeric develops a reddish-brown colour in the presence of a base. Since both independent observations point to alkalinity, option B is correct. An acid would produce the opposite litmus change, neutrality would not give these characteristic responses, and “gaseous” describes a state rather than the solution’s chemical nature.
Frequently asked questions
What is the correct answer to this question?
Basic
Why is this the correct answer?
The governing concept is the characteristic response of acid–base indicators. A basic solution changes red litmus to blue, and turmeric develops a reddish-brown colour in the presence of a base. Since both independent observations point to alkalinity, option B is correct. An acid would produce the opposite litmus change, neutrality would not give these characteristic responses, and “gaseous” describes a state rather than the solution’s chemical nature.
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.
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