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Which of the following is most effective...

Which of the following is most effective in coagulating positively charged hydrated ferric oxide sol ?
(i) `NaNO_(3)` (ii) `Na_(2)SO_(4)` (iii) `(NH_(4))_(3)PO_(4)`

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To determine which of the given options is most effective in coagulating positively charged hydrated ferric oxide sol, we can follow these steps: ### Step 1: Identify the charge of the sol Hydrated ferric oxide sol is positively charged. Therefore, we need to look for an anion (negatively charged ion) that can neutralize this positive charge. **Hint:** Remember that coagulation occurs when oppositely charged particles attract each other. ### Step 2: Analyze the options based on their anions ...
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