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निम्न में से कौन-कौन विलयन में उपस्थित होगा, जब `CO_(2)` को जल में घोला जाता हैं?
A. `CO_(2), H_(2)CO_(3), HCO_(3)^(-), CO_(3)^(2-)`
B. `H_(2)CO_(2), CO_(3)^(2-)`
C. `CO_(3)^(2-), HCO_(3)^(-)`
D. `CO_(2), H_(2)CO_(3)`

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Correct Answer - a
साम्य पर एक साथ,
`CO_(2) + H_(2)O ltimplies H_(2)CO_(3)`
`H_(2)CO_(3) ltimplies H^(+) + HCO_(3)^(-)`
`HCO_(3)^(-) ltimplies H^(+) + CO_(3)^(2-)`

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