Red litmus turns blue in which type of solution?
Answer and explanation
Correct answer: Basic solution
Red litmus turns blue in a basic or alkaline solution because the indicator responds to the hydroxide-rich chemical environment. This colour change is a standard qualitative test for bases. An acidic solution turns blue litmus red, while a neutral solution normally produces no change. A pure sugar solution is generally treated as neutral and therefore does not turn red litmus blue. Thus option B correctly identifies the solution type.
Frequently asked questions
What is the correct answer to this question?
Basic solution
Why is this the correct answer?
Red litmus turns blue in a basic or alkaline solution because the indicator responds to the hydroxide-rich chemical environment. This colour change is a standard qualitative test for bases. An acidic solution turns blue litmus red, while a neutral solution normally produces no change. A pure sugar solution is generally treated as neutral and therefore does not turn red litmus blue. Thus option B correctly identifies the solution type.
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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