TS EAMCET · Chemistry · Surface Chemistry
To resist the coagulation of \(100 \mathrm{cc}\) gold sol; 1 cC of \(10 \% \mathrm{NaCl}\) is added to it in the presence of \(10^{-4} \mathrm{~g}\) gelatin. The gold number of gelatin is
- A 1.0E-5
- B 0.0001
- C 0.001
- D 0.01
Answer & Solution
Correct Answer
(D) 0.01
Step-by-step Solution
Detailed explanation
Gold number is the amount (in milligrams) of aprotective colloid, which is just sufficient to prevent the coagulation of \(10 \mathrm{~mL}\) of standard hydro gold sol, when \(1 \mathrm{~mL}\) of \(10 \% \mathrm{NaCl}\) solution is added to it. \(\because 10 \mathrm{cc}\) gold…
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