Statement I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order-. $A l^{3+} {>Ba}^{2+} {>Na}^{+}$
Statement II : In the coagulation of a positive sol, the flocculating power of the three given salts is in the order- $N a C l > N a_{2} S O_{4} > N a_{3} P O_{4}$

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Both statement I and statement ll are incorrect.

Statement I is correct but statement II is incorrect

Statement I is incorrect but statement II is Correct.

Both statements I and statements lI are correct.

answer is B.

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Detailed Solution

According to Hardy Schulze Rule statement 1 is correct. (Generally, the greater the valence of the flocculating ion added, the greater is its power to cause precipitation)
According to Hardy Schulze Rule statement 2 is incorrect.

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