2023 · Q54
The gas generated on reacting zinc with dilute sulphuric acid is:
general-sciencechemistry
- AArgon
- BHelium
- CHydrogen
- DNitrogen
Explanation
Zinc lies above hydrogen in the reactivity series and therefore displaces hydrogen from dilute sulphuric acid: Zn + H2SO4 gives ZnSO4 + H2, with hydrogen gas evolved. Argon, helium and nitrogen take no part in this displacement reaction. Hence the gas generated is hydrogen.