JEE Main202331 Jan 2023Evening ShiftChemistryEnvironmental ChemistryActual
The normal rain water is slightly acidic and its pH value is 5 . 6 because of which one of the following ?
Options
- ACO 2 + H 2 O → H 2 CO 3
- BN 2 O 5 + H 2 O → 2 HNO 3
- C2 SO 2 + O 2 + 2 H 2 O → 2 H 2 SO 4
- D4 NO 2 + O 2 + 2 H 2 O → 4 HNO 3
Correct answer
A. CO 2 + H 2 O → H 2 CO 3
Step-by-step solution
Rain water has a pH of 5 - 6 due to presence of H + ions formed by the reaction of rain water with carbon dioxide present in the atmosphere. H 2 O ( l ) + CO 2 (   g ) ⇌ H 2 CO 3 H 2 CO 3 ⇌ H + + HCO 3 So, the correct option is A.