Exams › JEE Main › Chemistry

The metal that gives hydrogen gas upon treatment with both acid as well as base is:

1. mercury
2. zinc
3. iron
4. magnesium

Correct answer: zinc

Solution

Zinc is amphoteric: Zn + 2HCl -> ZnCl2 + H2 and Zn + 2NaOH -> Na2ZnO2 + H2, so it liberates hydrogen with both acids and bases.

Related JEE Main Chemistry questions

• Which statement correctly describes how chemical reactivity changes down the group for alkali metals and halogens?
• Which of the following is a true peroxide?
• When zeolite, a hydrated sodium aluminium silicate, is used with hard water, which ions from the water replace the sodium ions in the zeolite?
• Among the following carbonates, which one is the least thermally stable?
• The solubility of carbonates falls as we move down the magnesium group because there is a reduction in the
• Which of the following salts fails to give any colour in a flame test?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →