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Question

To coagulate [AgI]Ag+NO3 SoI; The decreasing order of coagulation power in following is -
NaCI
K2SO4
Ca3(PO4)2
K4[Fe(CN)6]

A
(a)>(b)>(c)>(d)
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B
(d)>(c)>(b)>(a)
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C
(a)>(d)>(c)>(b)
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D
(d)>(c)>(a)>(b)
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Solution

The correct option is B (d)>(c)>(b)>(a)
By Hardy Schulze rule coagulating power of an electrolyte is directly proportional to valency.
NaCl K2SO4 Ca3(PO4)2 K4[Fe(CN)6]
Valency: 1 2 3 4

The decreasing order is:
(d)>(c)>(b)>(a)

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