Question

Assertion: When two solutions are mixed, if the ionic product has a small value, precipitates won't be formed.

Reason: If an ionic product is less than $k_{s}p$, no precipitation will occur.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but the Reason is not the correct explanation of Assertion
  
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true
• E. Both Assertion and Reason are false

Answer 1

Answer: (A)

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

For a salt $AB$,
$AB\to A^{+}+B^{-}$
$K_{s}p=\left[A^{+}\right]\left[B^{-}\right]$
A precipitate will form when two solutions are mixed if the ion product is greater than the solubility product, i.e. $\left[A^{+}\right]\left[B^{-}\right]>K_{s}p$