Properties of Colloids
CHXII05:SURFACE CHEMISTRY

320892 Which of the following electrolyte will have maximum flocculation value for \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol?

1 \(\mathrm{NaCl}\)
2 \(\mathrm{Na}_{2} \mathrm{~S}\)
3 \(\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{K}_{2} \mathrm{SO}_{4}\)
CHXII05:SURFACE CHEMISTRY

320893 \(10^{-4} \mathrm{~g}\) of gelation is required to be added to \(100 \mathrm{~cm}^{3}\) of a standard gold solution to just prevent its precipitation by addition of \(1 \mathrm{~cm}^{3}\) of \(10 \%\) \(\mathrm{NaCl}\) solution to it. Hence the gold number of gelation in \(\mathrm{mg}\) is

1 10
2 1.0
3 0.1
4 0.01
CHXII05:SURFACE CHEMISTRY

320894 \({\text{400}}\,\,\,{\text{ml}}\) of standard sol is just prevented from coagulation by the addition of 0.96 gm of starch before adding \(1 \mathrm{ml}\) of \({\rm{10\% }}\,\,{\rm{NaCl}}\) solution, the gold number will be

1 2.4
2 7.6
3 240
4 24
CHXII05:SURFACE CHEMISTRY

320895 Gold number is a measure of:

1 The amount of gold present in the colloidal solution
2 The amount of gold required to break the colloid
3 The amount of protective colloid required to protect the colloid
4 None of the above
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CHXII05:SURFACE CHEMISTRY

320892 Which of the following electrolyte will have maximum flocculation value for \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol?

1 \(\mathrm{NaCl}\)
2 \(\mathrm{Na}_{2} \mathrm{~S}\)
3 \(\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{K}_{2} \mathrm{SO}_{4}\)
CHXII05:SURFACE CHEMISTRY

320893 \(10^{-4} \mathrm{~g}\) of gelation is required to be added to \(100 \mathrm{~cm}^{3}\) of a standard gold solution to just prevent its precipitation by addition of \(1 \mathrm{~cm}^{3}\) of \(10 \%\) \(\mathrm{NaCl}\) solution to it. Hence the gold number of gelation in \(\mathrm{mg}\) is

1 10
2 1.0
3 0.1
4 0.01
CHXII05:SURFACE CHEMISTRY

320894 \({\text{400}}\,\,\,{\text{ml}}\) of standard sol is just prevented from coagulation by the addition of 0.96 gm of starch before adding \(1 \mathrm{ml}\) of \({\rm{10\% }}\,\,{\rm{NaCl}}\) solution, the gold number will be

1 2.4
2 7.6
3 240
4 24
CHXII05:SURFACE CHEMISTRY

320895 Gold number is a measure of:

1 The amount of gold present in the colloidal solution
2 The amount of gold required to break the colloid
3 The amount of protective colloid required to protect the colloid
4 None of the above
CHXII05:SURFACE CHEMISTRY

320892 Which of the following electrolyte will have maximum flocculation value for \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol?

1 \(\mathrm{NaCl}\)
2 \(\mathrm{Na}_{2} \mathrm{~S}\)
3 \(\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{K}_{2} \mathrm{SO}_{4}\)
CHXII05:SURFACE CHEMISTRY

320893 \(10^{-4} \mathrm{~g}\) of gelation is required to be added to \(100 \mathrm{~cm}^{3}\) of a standard gold solution to just prevent its precipitation by addition of \(1 \mathrm{~cm}^{3}\) of \(10 \%\) \(\mathrm{NaCl}\) solution to it. Hence the gold number of gelation in \(\mathrm{mg}\) is

1 10
2 1.0
3 0.1
4 0.01
CHXII05:SURFACE CHEMISTRY

320894 \({\text{400}}\,\,\,{\text{ml}}\) of standard sol is just prevented from coagulation by the addition of 0.96 gm of starch before adding \(1 \mathrm{ml}\) of \({\rm{10\% }}\,\,{\rm{NaCl}}\) solution, the gold number will be

1 2.4
2 7.6
3 240
4 24
CHXII05:SURFACE CHEMISTRY

320895 Gold number is a measure of:

1 The amount of gold present in the colloidal solution
2 The amount of gold required to break the colloid
3 The amount of protective colloid required to protect the colloid
4 None of the above
CHXII05:SURFACE CHEMISTRY

320892 Which of the following electrolyte will have maximum flocculation value for \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol?

1 \(\mathrm{NaCl}\)
2 \(\mathrm{Na}_{2} \mathrm{~S}\)
3 \(\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4}\)
4 \(\mathrm{K}_{2} \mathrm{SO}_{4}\)
CHXII05:SURFACE CHEMISTRY

320893 \(10^{-4} \mathrm{~g}\) of gelation is required to be added to \(100 \mathrm{~cm}^{3}\) of a standard gold solution to just prevent its precipitation by addition of \(1 \mathrm{~cm}^{3}\) of \(10 \%\) \(\mathrm{NaCl}\) solution to it. Hence the gold number of gelation in \(\mathrm{mg}\) is

1 10
2 1.0
3 0.1
4 0.01
CHXII05:SURFACE CHEMISTRY

320894 \({\text{400}}\,\,\,{\text{ml}}\) of standard sol is just prevented from coagulation by the addition of 0.96 gm of starch before adding \(1 \mathrm{ml}\) of \({\rm{10\% }}\,\,{\rm{NaCl}}\) solution, the gold number will be

1 2.4
2 7.6
3 240
4 24
CHXII05:SURFACE CHEMISTRY

320895 Gold number is a measure of:

1 The amount of gold present in the colloidal solution
2 The amount of gold required to break the colloid
3 The amount of protective colloid required to protect the colloid
4 None of the above