Q. Which of the following carbonates decomposes at lowest temperature?
A) $MgCO_{3}$
B) $CaCO_{3}$
C) $SrCO_{3}$
D) $BaCO_{3}$
Explanation
(a)
On moving down the second group the thermal stability of alkaline earth metal carbonates increases.
Hence, $MgCO_{3},$ being the carbonate of upper element, decomposes at lowest temperature.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.