The coagulation values in millimoles per litre of the electrolyte for the coagulation of As2S3 sol are given as follows: I. NaCl(52) II. BaCl2(0.69) III. MgSO4(0.22) The correct order of coagulating power is:
A
I > II > III
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B
II > I > III
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C
III > II > I
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D
III > I > II
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Solution
The correct option is C III > II > I Lower the coagulation value, greater is the coagulating power.