Adding acid to a solution gives no carbon dioxide, but adding zinc gives hydrogen. What nature could the solution already have?
Answer and explanation
Correct answer: Acidic
Zinc can react with an acidic solution and displace hydrogen, producing hydrogen gas; in a simplified equation, zinc plus acid forms a salt and H2. Carbon dioxide, however, appears when an acid reacts with carbonate or hydrogen carbonate. Since acid addition produced no CO2, carbonate is not indicated, while hydrogen from zinc supports an acidic nature. Therefore option A is the best conclusion among the choices.
Frequently asked questions
What is the correct answer to this question?
Acidic
Why is this the correct answer?
Zinc can react with an acidic solution and displace hydrogen, producing hydrogen gas; in a simplified equation, zinc plus acid forms a salt and H2. Carbon dioxide, however, appears when an acid reacts with carbonate or hydrogen carbonate. Since acid addition produced no CO2, carbonate is not indicated, while hydrogen from zinc supports an acidic nature. Therefore option A is the best conclusion among the choices.
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.
