Assertion : Fe^{3+} can be used for coagulati | vedclass

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(C) The $As_2S_3$ sol is negatively charged due to the preferential adsorption of $S^{2-}$ ions on its surface. According to the Hardy-Schulze law,the

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If the Assertion is correct but Reason is incorrect.

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(C) The $As_2S_3$ sol is negatively charged due to the preferential adsorption of $S^{2-}$ ions on its surface. According to the Hardy-Schulze law,the coagulating power of an ion increases with the increase in the magnitude of its charge. $Fe^{3+}$ ions are positively charged and effectively neutralize the negative charge of the $As_2S_3$ sol particles,leading to coagulation. The reason provided,that $Fe^{3+}$ reacts with $As_2S_3$ to form $Fe_2S_3$,is chemically incorrect as coagulation is a surface phenomenon involving charge neutralization,not a chemical reaction forming $Fe_2S_3$.

Assertion : $Fe^{3+}$ can be used for coagulation of $As_2S_3$ sol.
Reason : $Fe^{3+}$ reacts with $As_2S_3$ to give $Fe_2S_3$.

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Assertion : $Fe^{3+}$ can be used for coagulation of $As_2S_3$ sol. Reason : $Fe^{3+}$ reacts with $As_2S_3$ to give $Fe_2S_3$.