Question

Which of the following metal carbonate is decomposed on heating?

• A. $Na_2CO_3$
• B. $MgCO_3$
• C. $K_2CO_3$
• D. $Rb_2CO_3$

Answer 1

Answer: (B)

$MgCO_3$

Answer 2

${MgCO3->[heat]MgO +CO2}$ That metal carbonate will be unstable whose oxide is stable.