TS EAMCET 11-Sep-2020 Shift 2 Solved Paper

Gold number is the amount (in milligrams) of a protective colloid, which is just sufficient to prevent the coagulation of 10mL of standard hydro gold sol, when 1mL of 10%NaCl solution is added to it.
∵10cc gold sol=1cc of 10%NaCl
∴100mL of gold sol =1 cc of gelatin
Therefore, gold number of gelatin is