The compound A on heating gives a colourless gas and a residue thata dissolved in water to obtain B. Excess of `CO_(2)` is bubbled through aqueous sol

Question

The compound A on heating gives a colourless gas and a residue thata dissolved in water to obtain B. Excess of `CO_(2)` is bubbled through aqueous sol

The compound A on heating gives a colourless gas and a residue thata dissolved in water to obtain B. Excess of `CO_(2)` is bubbled through aqueous solution of B,C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound is:-
A. `CaCO_3`
B. `Na_2CO_3`
C. `K_2CO_3`
D. `CaSO_4.2H_2O`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
`underset((A))CaCO_3(s)overset(Delta)toCO_2(g)+CaO(s)`
`CaO(s)+H_2O)l)toCa(OH)_2(aq)`
`underset(C)Ca(OH)_2(aq)+underset("excess")2CO_2(g)tounderset(C)Ca(HCO_3)_2(aq)`
`underset(C)Ca(HCO_3)_2(aq)overset(Delta)tounderset(A)CaCO_3(s)+CO_2(g)+H_2O(l)`

4 views Answered 2023-02-05 15:29