Question
Chemistry Question on GROUP 2 ELEMENTS
The correct order of increasing thermal stability of K2CO3,MgCO3,CaCO3 and BeCO3 is
A
BeCO3<MgCO3<K2CO3<CaCO3
B
BeCO3<MgCO3<CaCO3<K2CO3
C
MgCO3<BeCO3<CaCO3<K2CO3
D
K2CO3<MgCO3<CaCO3<BeCO3
Answer
BeCO3<MgCO3<CaCO3<K2CO3
Explanation
Solution
Thermal stability of carbonates increases in a group as we move from top to bottom and decreases in a period as we move from left to right, so the correct order of thermal stability of given carbonates
is
BeCO3<MgCO3<CaCO3<K2CO3
Be,Mg and Ca are present in second group and K is present in first group