Properties of Colloids
CHXII05:SURFACE CHEMISTRY

320909 For the coagulations of positively charged hydrated ferric - oxide sol, the flocculating power of the ions is in the order:

1 \({\mathrm{\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
2 \({\mathrm{\mathrm{Cl}^{-}>\mathrm{SO}_{4}^{2-}>\mathrm{PO}_{4}^{3-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
3 \({\mathrm{\mathrm{SO}_{4}^{2-}=\mathrm{Cl}^{-}=\mathrm{PO}_{4}^{3-}=\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
4 \({\mathrm{\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}}}\)
CHXII05:SURFACE CHEMISTRY

320910 The electrolyte having maximum flocculation value for \(\mathrm{AgI} / \mathrm{Ag}^{+}\)sol is

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

320911 Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to

1 coagulation of negatively charged blood particles by \(\mathrm{Fe}^{3+}\) ions.
2 coagulation of positively charged blood particles by \(\mathrm{Cl}^{-}\)ions.
3 reaction taking place between ferric ions and the haemoglobin forming a complex.
4 common element, iron, in both \(\mathrm{FeCl}_{3}\) and haemoglobin.
CHXII05:SURFACE CHEMISTRY

320912 A negatively charged suspension of clay in water will need for precipitation the minimum amount of

1 Aluminium chloride
2 Potassium sulphate
3 Sodiumhydroxide
4 Hydrochloric acid
CHXII05:SURFACE CHEMISTRY

320909 For the coagulations of positively charged hydrated ferric - oxide sol, the flocculating power of the ions is in the order:

1 \({\mathrm{\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
2 \({\mathrm{\mathrm{Cl}^{-}>\mathrm{SO}_{4}^{2-}>\mathrm{PO}_{4}^{3-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
3 \({\mathrm{\mathrm{SO}_{4}^{2-}=\mathrm{Cl}^{-}=\mathrm{PO}_{4}^{3-}=\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
4 \({\mathrm{\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}}}\)
CHXII05:SURFACE CHEMISTRY

320910 The electrolyte having maximum flocculation value for \(\mathrm{AgI} / \mathrm{Ag}^{+}\)sol is

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

320911 Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to

1 coagulation of negatively charged blood particles by \(\mathrm{Fe}^{3+}\) ions.
2 coagulation of positively charged blood particles by \(\mathrm{Cl}^{-}\)ions.
3 reaction taking place between ferric ions and the haemoglobin forming a complex.
4 common element, iron, in both \(\mathrm{FeCl}_{3}\) and haemoglobin.
CHXII05:SURFACE CHEMISTRY

320912 A negatively charged suspension of clay in water will need for precipitation the minimum amount of

1 Aluminium chloride
2 Potassium sulphate
3 Sodiumhydroxide
4 Hydrochloric acid
CHXII05:SURFACE CHEMISTRY

320909 For the coagulations of positively charged hydrated ferric - oxide sol, the flocculating power of the ions is in the order:

1 \({\mathrm{\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
2 \({\mathrm{\mathrm{Cl}^{-}>\mathrm{SO}_{4}^{2-}>\mathrm{PO}_{4}^{3-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
3 \({\mathrm{\mathrm{SO}_{4}^{2-}=\mathrm{Cl}^{-}=\mathrm{PO}_{4}^{3-}=\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
4 \({\mathrm{\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}}}\)
CHXII05:SURFACE CHEMISTRY

320910 The electrolyte having maximum flocculation value for \(\mathrm{AgI} / \mathrm{Ag}^{+}\)sol is

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

320911 Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to

1 coagulation of negatively charged blood particles by \(\mathrm{Fe}^{3+}\) ions.
2 coagulation of positively charged blood particles by \(\mathrm{Cl}^{-}\)ions.
3 reaction taking place between ferric ions and the haemoglobin forming a complex.
4 common element, iron, in both \(\mathrm{FeCl}_{3}\) and haemoglobin.
CHXII05:SURFACE CHEMISTRY

320912 A negatively charged suspension of clay in water will need for precipitation the minimum amount of

1 Aluminium chloride
2 Potassium sulphate
3 Sodiumhydroxide
4 Hydrochloric acid
CHXII05:SURFACE CHEMISTRY

320909 For the coagulations of positively charged hydrated ferric - oxide sol, the flocculating power of the ions is in the order:

1 \({\mathrm{\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
2 \({\mathrm{\mathrm{Cl}^{-}>\mathrm{SO}_{4}^{2-}>\mathrm{PO}_{4}^{3-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
3 \({\mathrm{\mathrm{SO}_{4}^{2-}=\mathrm{Cl}^{-}=\mathrm{PO}_{4}^{3-}=\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}}}\)
4 \({\mathrm{\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{Cl}^{-}}}\)
CHXII05:SURFACE CHEMISTRY

320910 The electrolyte having maximum flocculation value for \(\mathrm{AgI} / \mathrm{Ag}^{+}\)sol is

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

320911 Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to

1 coagulation of negatively charged blood particles by \(\mathrm{Fe}^{3+}\) ions.
2 coagulation of positively charged blood particles by \(\mathrm{Cl}^{-}\)ions.
3 reaction taking place between ferric ions and the haemoglobin forming a complex.
4 common element, iron, in both \(\mathrm{FeCl}_{3}\) and haemoglobin.
CHXII05:SURFACE CHEMISTRY

320912 A negatively charged suspension of clay in water will need for precipitation the minimum amount of

1 Aluminium chloride
2 Potassium sulphate
3 Sodiumhydroxide
4 Hydrochloric acid