Which one of the following reactions does not result in the evolution of hydrogen gas ?
[amp_mcq option1=”Reaction of zinc metal with dilute sulphuric acid solution” option2=”Mixing water to Plaster of Paris” option3=”Heating zinc metal with sodium hydroxide solution” option4=”Reaction of potassium metal with water” correct=”option2″]
This question was previously asked in
UPSC NDA-1 – 2021
A) Active metals like zinc react with dilute acids (Zn + H₂SO₄ → ZnSO₄ + H₂).
C) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH → Na₂ZnO₂ + H₂).
D) Highly reactive metals like potassium react vigorously with water (2K + 2H₂O → 2KOH + H₂).