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Describe following with diagram :

Tyndall effect 

Important Questions on Surface Chemistry

EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Gold numbers of some colloids are Gelatin: 0.005-0.01, Gum Arabic: 0.15-0.25, Oleate: 0.04-1.0, Starch: 15-25. Which among the following is a better protective colloid?
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
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
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Among the following, the correct statement is:
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Among the following, the incorrect statement about colloids is:
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
For coagulation of arsenious sulphide sol, which of the following salt solutions will be most effective?
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
The correct option among the following is.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
The Tyndall effect is observed only when the following conditions are satisfied,

i The diameter of the dispersed particles is much smaller than the wavelength of the light used.

ii The diameter of the dispersed particle is not much smaller than the wavelength of the light used.

iii The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.

iv The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Tyndall effect is observed when :
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Among the following, the false statement is:
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
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>Properties of Colloidal Solutions
Which property of colloids is not dependent on the charge on colloidal particles?
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
On which of the following properties, does the coagulating power of an ion depend?
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order:
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Which mixture of the solutions will lead to the formation of negatively charged colloidal AgII- sol?
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
In the coagulation of a positive sol, the flocculating power of the ions PO43-,SO42- and Cl- decreases in the order
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Write any two differences between lyophilic and lyophobic colloids.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Measuring Zeta potential is useful in determining which property of colloidal solution?
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Which property of colloidal solution is independent of charge on the colloidal particles?
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
The haemoglobin and the gold sol are examples of
MEDIUM
Chemistry>Physical Chemistry>Surface Chemistry>Properties of Colloidal Solutions
Which of the following statements about colloids is false?