| Assertion: NaCl solution can be purified by passage of hydrogen chloride through brine. |
| Reason: This type of purification is based on Le-Chaterlier's principle. |
| Read the assertion and reason carefully to mark the correct option out of the options given below: |
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
[c] Assertion is true but reason is false. This is based on common ion effect. \[NaCl\]⇌\[N{{a}^{+}}+C{{l}^{-}}\]; \[HCl\]⇌ \[{{H}^{+}}+C{{l}^{-}}\] Concentration of \[C{{l}^{-}}\] ions increases due to ionisation of \[HCl\] which increases the ionic product \[[N{{a}^{+}}]\,[C{{l}^{-}}]\]. This result in the precipitation of pure \[NaCl\].
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