KCET2022Chemistryp Block Elements (Group 13 & 14)
Which property of CO ₂ makes it biologically and geo-chemically important ?
Options
- AIts colourless and odourless nature
- BIts low solubility in water
- CIts high compressibility
- DIts acidic nature
Correct answer
B. Its low solubility in water
Step-by-step solution
The property of low solubility of carbon dioxide in water makes it biologically and geo-chemically important. Carbon dioxide on reaction with water form carbonic acid, which dissociates to give HCO ₃⁻ ions. H ₂ CO ₃ / HCO ₃⁻ buffer system helps to maintain pH of blood between 7.26-7.42 .