A) 0.1 N \[Zn{{(N{{O}_{3}})}_{2}}\]
B) 0.1 N \[N{{a}_{3}}P{{O}_{4}}\]
C) 0.1 N \[ZnS{{O}_{4}}\]
D) 0.1 N \[AlC{{l}_{3}}\]
Correct Answer: D
Solution :
More is the valence of effective ion, greater is its coagulating power (by Hardy Schuize rule). Since, the sol in negatively charged, positive ions are the effective ion. Thus, \[0.1\,\,N\,\,AlC{{l}_{3}}\] because of the presence of \[A{{l}^{3+}}\] ions, has the maximum coagulating power for this sol.
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