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प्रश्न
Write one difference in Coagulation and Peptization
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उत्तर
Coagulation and Peptization
| Coagulation | Peptization |
| The process of settling of colloidal particles is called coagulation or precipitation of the sol | The process of converting a precipitate into colloidal sol by shaking it with dispersion medium in presence of small amount of electrolyte (peptising agent) are also known as associated peptization |
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संबंधित प्रश्न
A solution of glucose in water is labelled as 10% (W/W).
Calculate:
a. Molality
b. Molarity of the solution.
[Given: Density of solution is 1.20 g mL-1 and molar mass of glucose is 180 g mol-1 ]
Calculate the amount of CaCl2 (van't Hoff factor i = 2.47) dissolved in 2.5 L solution so that its osmotic pressure at 300K is 0.75 atmosphere.
Given : Molar mass of CaCl2 is 111g mol-1
R=0.082 L.atm K-1mol-1
A solution of glucose (molar mass = 180 g mol–1) in water is labelled as 10% (by mass). What would be the molality and molarity of the solution ? (Density of solution = 1.2 g mL–1)
A solution of a substance having mass 1.8 x 10-3 kg has the osmotic pressure of 0.52 atm at 280 K. Calculate the molar mass of the substance used.
[Volume = 1 dm3, R = 8.314 J K-1 mol-1]
Out of 0.1 molal aqueous solution of glucose and 0.1 molal aqueous solution of KCl, which one will have higher boiling point and why?
Define the following terms :
a. Cryoscopic constant
b. Resistivity
Colligative properties depend on ______.
Colligative properties are observed when:
(i) a non volatile solid is dissolved in a volatile liquid.
(ii) a non volatile liquid is dissolved in another volatile liquid.
(iii) a gas is dissolved in non volatile liquid.
(iv) a volatile liquid is dissolved in another volatile liquid.
Elevation in boiling point for 1.5 molal solution of glucose in water is 4 K The depression in freezing point of 4.5 molal solution of glucose in water is 4 K. The ratio of molal elevation constant to molal depression constant (Kb/Kf) is ______.
The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.
