Q. On heating which of the following releases $CO_2$ most easily ?
A) $MgCO_3$
B) $CaCO_3$
C) $K_2CO_3$
D) $Na_2CO_3$
Explanation
[Solution] Thermal stability: $K_2CO_3 > Na_2CO_3 > CaCO_3 > MgCO_3$, so $MgCO_3$ decomposes most easily. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.