Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason — s Block Elements Chemistry Question
Question
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): Barium carbonate is insoluble in water and is highly stable. Reason (R): The thermal stability of the carbonates increases with increasing cationic size. (A) Both (A) and (R) are true and (R) is the true explanation of (A) (B) (A) is true but (R) is false (C) Both (A) and (R) are true and (R) is not the true explanation of (A) (D) (A) is false but (R) is true.
💡 Solution & Explanation
Carbonates of alkaline earth metals are insoluble in water. The solubility of carbonates in water decreases as the atomic number of the metal ion increases. All the carbonates of alkaline earth metals decompose on heating to give carbon dioxide and the oxide. The thermal stability increases with increasing cationic size.