Question
The reaction that occurs on passing carbon dioxide gas through lime water is
NDA
General Ability
General Science
2025
NDA 2025 (Phase 2)
NDA General Ability Question (2025) — Solution
Options
- A. CaCO_3 + H_2O + CO_2 Ca(HCO_3)_2
- B. Ca(OH)_2 + CO_2 CaCO_3 + H_2O
- C. CaO + CO_2 CaCO_3
- D. CaCl_2 + H_2O + CO_2 CaCO_3 + 2HCl
Answer
B. Ca(OH)_2 + CO_2 CaCO_3 + H_2O
Step-by-step solution
Lime water is an aqueous solution of calcium hydroxide, Ca(OH)_2. When carbon dioxide gas is passed through lime water, it reacts with calcium hydroxide to form a white precipitate of calcium carbonate and water. The chemical equation for this reaction is: Ca(OH)_2 + CO_2 CaCO_3 + H_2O Answer: Ca(OH)_2 + CO_2 CaCO_3 + H_2O
Related: General Ability — General Science · All PYQ Banks