Question
Chemistry Question on Organic Chemistry- Some Basic Principles and Techniques
A solid compound 'X' on heating gives CO2 gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of CO2 through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is
A
CaCO3
B
Na2CO3
C
K2CO3
D
Ca(HCO3)2
Answer
CaCO3
Explanation
Solution
The compound 'X' that forms CO₂ gas on heating, 'Y' on mixing with water, and 'Z' on passing excess CO₂ through 'Y' and boiling is CaCO₃.