NEET UG CHEMISTRY MCQ: SURFACE CHEMISTRY

1 Medium

1 of 1

Application +4 | -1

On adding

\left| m \right|

solution of 10 % NaCl to 10 ml gold Sol in presence of 0.25 g starch so that coagulation is just prevented, what will be gold number of starch

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Correct option: C

250

Option C (250) is correct because the gold number is defined as the mass in milligrams of a protective colloid that prevents the coagulation of 10 mL of a gold sol when 1 mL of a 10% NaCl solution is added.

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A cationic colloidal electrolyte forms micelle at

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\log \frac{{x}}{{m}}

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19\;\mathrm{g/c}{\mathrm{m}^3}

. If

{1.9 \times {{10}^{ - 4}}\;\mathrm{g}}

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