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JEE Main202126 Aug 2021Evening ShiftChemistrys Block ElementsActual

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. Choose the most appropriate answer from the options given below :

Options

  1. A(A) is true but (R) is false.
  2. BBoth (A) and (R) are true.
  3. C(A) is false but (R) is true.
  4. DBoth (A) and (R) are false.

Correct answer

B. Both (A) and (R) are true.

Step-by-step solution

(i) Stability ↑ as size of cation ↑ , ionic character ↑ (ii) Solubility in water ↓

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