The compound (on heating gives a colourless gas and a residue that is dissolved in water to obtain (B). Excess of CO2 is bubbled through aqueous solution of B, C is formed. Solid (on heating gives back X. (B) is ………………………. .
A. CaCO3
B. Ca(OH)2
C. Na2CO2
D. NaHCO3
Answer:B
The compound (on heating gives a colourless gas and a residue that is dissolved in water to obtain (B). Excess of CO2 is bubbled through aqueous solution of B, C is formed. Solid (on heating gives back X. (B) is ………………………. .
A. CaCO3 B. Ca(OH)2 C. Na2CO2 D. NaHCO3