NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- s Block Elements
NTA Abhyas 2020 · Chemistry · s Block Elements
A solid compound X on heating gives C O _ 2 gas and a residue. The...
A solid compound X on heating gives gas and a residue. The residue mixed with water forms Y. On passing an excess of through Y in water, a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is
Options
- ACa{\left(HC{O}_{3}\right)}_{2}
- B
- C
- D
Correct answer
B.
Step-by-step solution
The given compound X must be . It can be explained by following reaction
_{\left(Y\right)}Ca{\left(OH\right)}_{2} + 2C{O}_{2} + {H}_{2}O \to \mathop{Ca{\left(HC{O}_{3}\right)}_{2}}_{\left(Z\right)}Ca{\left(HC{O}_{3}\right)}_{2}\overset{\Delta}{→}\mathop{CaC{O}_{3}}_{\left(X\right)} + C{O}_{2} ↑ + {H}_{2}O
_{\left(Y\right)}Ca{\left(OH\right)}_{2} + 2C{O}_{2} + {H}_{2}O \to \mathop{Ca{\left(HC{O}_{3}\right)}_{2}}_{\left(Z\right)}Ca{\left(HC{O}_{3}\right)}_{2}\overset{\Delta}{→}\mathop{CaC{O}_{3}}_{\left(X\right)} + C{O}_{2} ↑ + {H}_{2}O