Multiple choice

In which of the following reactions is a salt formed without the release of hydrogen gas?

  1. Zn reacts with hydrochloric acid

  2. Sodium reacts with hydrochloric acid

  3. Zinc reacts with sulphuric acid

  4. Calcium carbonate reacts with hydrochloric acid

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acids give hydrogen gas along with a salt when they react with a metal. Here, a metal carbonate reacts with an acid to give carbon dioxide and water.