JEE Advanced2006Chemistryp Block Elements (Group 13 & 14)Actual

The species present in solution when CO ₂ is dissolved in water are

Options

ACO ₂, H ₂ CO ₃, HCO ₃⁻, CO ₃²⁻
BH ₂ CO ₃, CO ₃²⁻
CCO ₃²⁻, HCO ₃⁻
DCO ₂, H ₂ CO ₃

Correct answer

A. CO ₂, H ₂ CO ₃, HCO ₃⁻, CO ₃²⁻

Step-by-step solution

When CO ₂ is dissolved in water, therefore it forms dibasic carbonic acid, which gives HCO ₃⁻ and CO ₃²⁻ ions on ionisation. Hence in solution CO ₂, H ₂ CO ₃, HCO ₃⁻ and CO ₃²⁻ are present.

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