Question

On addition of 1 ml solution of 10% NaCl to 10 ml of gold sol in the presence of 0.025g of starch the coagulation is just prevented. The gold number of starch is (A) 0.025 (B) 0.25 (C) 2.5 (D) 25
I want solution

Answer 1

Your answer is (d) 25.