HARD
Earn 100

Describe the role of colloids in sewage disposal.

Important Questions on Surface Chemistry

EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Ferric chloride is applied to stop bleeding because
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Explain the cleansing action of soap and detergents.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Photographic plates are prepared by coating emulsion of which of the following in gelatin.
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
The coagulating power of electrolytes having ions Na+,  Al3+ and Ba2+ for arsenic sulphide sol increases in the order,
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
The critical micelle concentration of a surfactant depends on
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
For coagulation of arsenious sulphide sol, which of the following salt solutions will be most effective?
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
In the following, which type of colloidal system is Fog-
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
The most appropriate method of making egg-albumin sol is:
MEDIUM
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Why are medicines more effective in colloidal state?

EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Give reasons for the following: FeCl3 solution is used to stop bleeding.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below,

I. NaCl=52

II. BaCl2=0.69

III. MgSO4=0.22

The correct order of their coagulating power is
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Colloidal solution commonly used in treatment of skin diseases is:
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
When a sulphur sol is evaporated sulphur is obtained. On mixing with water sulphur sol is not formed. The sol is
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Fog is a colloidal solution of:
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Among the following, the correct statement is:
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Peptization is a:
HARD
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
The correct statement(s) about surface properties is(are)
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
Mention two industrial applications of colloids.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
To stop blood from a wound, which of the following sol is preferred?
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Colloids Around Us
How does the precipitation of colloidal smoke take place in Cottrell precipitator?