2025 · Q110
The chemical reaction K2SO4 + BaCl2 → 2KC1 + BaSO4↓ (aq.) (aq.) (aq.) (solid) is an example of:
General KnowledgeChemistry
- AAddition reaction
- BDisplacement reaction
- CDecomposition reaction
- DDouble displacement reaction
Explanation
K2SO4 + BaCl2 → 2KCl + BaSO4↓ involves the exchange of ions between two compounds, with insoluble barium sulphate precipitating out. This is a double displacement (precipitation) reaction — not an addition, single displacement or decomposition reaction. The downward arrow in the equation denotes the precipitate leaving the solution.