List of top Chemistry Questions on Colloids

Given below are two statements: Statement I: Animal skin is positively charged and tannin is negatively charged. Statement II: In leather tanning, chromium salts are used in place of tannin.

A colloidal solution is subjected to an electric field. The colloidal particles move toward the anode. In the coagulation of this solution using NaCl, BaCl$_2$ and AlCl$_3$ separately, which one is the correct order of coagulation power?

Which electrolyte is most effective in the coagulation of a negative sol like \(As_2S_3\)?

Which of the following electrolytes is most effective in the coagulation of a negative sol like \(As_2S_3\)?

The Zeta potential is related to which property of colloids?

Which of the following is not negatively charged sol?

Which from following process does NOT results in coagulation?

Which of the following statements is NOT true about lyophobic colloids?

Which of the following techniques is most suitable for determining the size and morphology of nanoparticles?

Butter is an example of which type of colloid?

Milk-water mixture when viewed by the reflected light appears in which colour?

The sol formed in the following unbalanced equation is:
\[ As_2O_3 + H_2S \rightarrow \]

The colloidal solution used to treat stomach disorders is

The correct order of coagulating power of the following ions to coagulate the positive sol is
\[ \text{I. } [Fe(CN)_6]^{4-} \] \[ \text{II. } Cl^{-} \] \[ \text{III. } SO_4^{2-} \]

Assertion (A): Animal skins are colloidal in nature
Reason (R): Animal skin has positively charged particles.

The macromolecular colloids of the following are
I. Starch solution II. Sulphur sol III. Synthetic detergent IV. Synthetic rubber

Which of the following methods are used for the coagulation of lyophobic colloidal solutions?
I. Cooling
II. Electrophoresis
III. Mixing two oppositely charged sols
IV. Dialysis for short duration

Assertion (A): Addition of an excess electrolyte to the colloidal solution leads to the precipitation of colloidal particles.
Reason (R): The charged electrolyte particles neutralises the oppositely charged colloidal particles and promotes coagulation of colloidal sols.

The correct property of colloidal solutions when compared to that of true solutions is:

When a dilute \(AgNO_3\) solution is mixed with excess of dilute \(KI\), the colloidal solution formed is

Identify the correct decreasing order of precipitation power of flocculating ion added, from following.

Sunscreen lotions contains nanoparticles of

Identify negatively charged sol from following.

Which among the following is a multi-molecular colloid?