If blue litmus turns red in a solution and bubbles form when carbonate is added, which conclusion is correct?
Answer and explanation
Correct answer: The solution is acidic
The governing concept is the characteristic reaction of acids. An acid turns blue litmus red, showing that the solution is acidic. Acids also react with carbonates to form a salt, water, and carbon dioxide; the carbon dioxide escapes as visible bubbles. Therefore option A is correct. A basic or neutral solution would not give both of these observations under the stated conditions.
Frequently asked questions
What is the correct answer to this question?
The solution is acidic
Why is this the correct answer?
The governing concept is the characteristic reaction of acids. An acid turns blue litmus red, showing that the solution is acidic. Acids also react with carbonates to form a salt, water, and carbon dioxide; the carbon dioxide escapes as visible bubbles. Therefore option A is correct. A basic or neutral solution would not give both of these observations under the stated conditions.
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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