1.

On addition of one mL solution of 10% NaCl to 10mL gold solution in the presence of 0.025 g of starch,the coagulation is prevented because starch has the following gold numbers

Answer»

25
0.025
0.25
2.5

Solution :Minium AMOUNT of dryprotective colloid in milligram which can just prevent the coagulation of 10 ML of RED gold SOL. On the addition of 1mL of 10% NACL solution to it.


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