Chemistry · JEE | EQUILIBRIUM

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The pH of a 0.05M ammonia solution is less than 11 under standard conditions. Reason (R): The degree of ionization \( \alpha \) of 0.05M ammonia solution is calculated using \( \sqrt{K_b / c} \), yielding an approximate value of 0.018. In the light of the above statements, choose the correct answer from the options given below:

1. A
   Both (A) and (R) are true and (R) is the correct explanation of (A).
2. B
   Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
3. C
   (A) is true but (R) is false.
4. D
   (A) is false but (R) is true.