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Question

Chemistry Question on Colloids

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3As_2S_3 are given below :
I. (NaCl)=52(NaCl) = 52,
II. (BaCl2)=0.69(BaCl_2) = 0.69,
III. (MgSO4)=0.22(MgSO_4) = 0.22
The correct order of the their coagulating power is

A

I > II > III

B

II > I > III

C

III > II > I

D

III > I > II

Answer

III > II > I

Explanation

Solution

There is an inverse relation between the coagulation power and coagulation value. Coagulation is the process of clumping or aggregation of the particles to form a solid or semi solid mass. So, according to the question the coagulation value of the substances are:

I. NaCl= 52

II. BaCl2= 0.69

III. MgSO4= 0.22

Therefore, the coagulating power is in the order III> II> I