Which statement is correct for acids?
Answer and explanation
Correct answer: They can produce carbon dioxide from metal carbonates
Acids react with metal carbonates to form a salt, water, and carbon dioxide: acid + carbonate → salt + H₂O + CO₂. This reaction makes option A correct. Acids generally turn blue litmus red, so option B reverses the indicator change. In aqueous solution acids produce ions, especially hydrogen or hydronium ions, which rejects option C. They do not produce oxygen with all metals, so D is also false.
Frequently asked questions
What is the correct answer to this question?
They can produce carbon dioxide from metal carbonates
Why is this the correct answer?
Acids react with metal carbonates to form a salt, water, and carbon dioxide: acid + carbonate → salt + H₂O + CO₂. This reaction makes option A correct. Acids generally turn blue litmus red, so option B reverses the indicator change. In aqueous solution acids produce ions, especially hydrogen or hydronium ions, which rejects option C. They do not produce oxygen with all metals, so D is also false.
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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