Four different carbonates of Group II elements are heated under identical conditions. Which of these carbonates will require the highest temperature to undergo thermal decomposition?
Q1. Four different carbonates of Group II elements are heated under identical conditions. Which of these carbonates will require the highest temperature to undergo thermal decomposition?
Answer: Barium carbonate
Explanation: Larger cations stabilize larger anions like carbonate; as you go down Group II, the cation size increases, making the carbonate more thermally stable.