The species present in solution when CO2 is dissolved in water are
A
CO2,H2CO3,HCO−3,CO2−3
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B
H2CO3,CO2−3
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C
HCO−3,CO2−3
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D
CO2,H2CO3
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Solution
The correct option is ACO2,H2CO3,HCO−3,CO2−3 When CO2 is dissolved in water, following equilibria are established: H2O+CO2⇌H2CO3H2CO3⇌H++HCO−3HCO−3⇌H++CO2−3 Therefore, in solution, all of the above mentioned species exist.