Assertion: Baryta water becomes turbid on passing { CO }_{ 2 } gas through it but turbidity becomes clear on passing more { CO }_{ 2 } gas. Reason: Carbonates give white precipitates with silver nitrate solution. The precipitate becomes yellow or brown if the mixture is boiled.(a) Both Assertion and Reason are correct and Reason is the correct explanation for the Assertion. (b) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.(c) Assertion is incorrect but the reason is correct.(d) Both assertion and reason are correct.

The assertion is incorrect, and the reason is also incorrect.

Baryta water, which is a solution of barium hydroxide (Ba(OH)2) in water, becomes turbid when carbon dioxide (CO2) gas is passed through it because it forms barium carbonate (BaCO3), which is insoluble in water and appears as a white precipitate. However, when more CO2 gas is passed through the solution, it forms barium bicarbonate (Ba(HCO3)2), which is soluble in water. As a result, the turbidity clears up.

The reason given, "Carbonates give white precipitates with silver nitrate solution. The precipitate becomes yellow or brown if the mixture is boiled," does not directly relate to the phenomenon of baryta water becoming turbid when CO2 gas is passed through it. Therefore, the reason is not a correct explanation for the assertion.

So, the correct option is:
(c) Assertion is incorrect, but the reason is correct.