A compound 'A' on heating gives a colourless gas. The residue is dissolved in water to obtain B. Excess CO2 is passed through aqueous solution of B, when C is formed. C on gentle heating gives back A. The compound A isA. NaHCO3 B. Na2CO3 C. Ca(HCO3)2 D. CaCO3

Manvendra Singh chahar , 10 Years ago

Grade Upto college level