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  • Which of the following has maximum tendency to coagulate As2S3 -JEE MAIN 2019

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As_2S_3 is a negatively charged colloid. 

According to Hardy Schulze rule, greater the charge on the oppositely charged ion of the electrolyte added, more effective is the coagulation. Thus to coagulate a negatively charged colloid, we must see the positively charged ions.

AlCl_3 contains Al^{3+}ions,

BaCl_2  contains Ba^{2+} ions,  

Na_3(PO)_4 contains Na^{+} ions,   

NaCl contains Na^{+}  ions. 

Here, Al^{3+} ion has the highest positive charge and bearing the highest positive charge is most effective in bringing the coagulation of negatively charged colloid.

Hence the correct option is (1).

.

 

Posted by

Pankaj Sanodiya

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