Colloids around us - class-XII
Description: colloids around us | |
Number of Questions: 22 | |
Created by: Girish Goud | |
Tags: surface chemistry adsorption and colloids chemistry |
Which of the following statements are correct?
(i) When an animal hide, which has negatively charged particles, is soaked in tannin, which contains positively charged colloidal particles, mutual coagulation does not take place.
(ii) Photographic films are prepared by coating an emulsion of the light sensitive silver bromide in gelatin over glass plates or celluloid films.
(iii) Latex is a colloidal solution of rubber particles which are negatively charged.
(iv) In Cottrell precipitator, the smoke, before it comes out from the chimney, is led through a chamber containing plates having a charge opposite to that carried by smoke particles. The particles on coming in contact with these plates acquire some charge and do not get precipitated.
Some medicines are more effective in the colloidal form because of:
Which reagent, when mixed with ammonium sulfate and then heated, liberates ammonia?
Tanning of leather is the :
Gelatin is often used as an ingredient in the manufacture of ice-cream. The reason for this is :
Example of an intrinsic colloid is:
Gelatin has the minimum protective powers.
Smoke precipitator works on the principle of :
Which of these can be one of the uses of colloids?
Argyrol is a:
Which of the following is NOT used in making photographic plates using colloidal sols?
Colloidal sols are more effective for medical purposes because:
Delta formation at the mouth of river takes place by:
Which of the following are adsorption indicators?
The colloidal sol found effective in the treatment of eye disease is:
The colloidal solution of $X$ in gelatin is applied in glass plates to form sensitive plates in photography. Identify $X$:
Smoke particles are actually electrically charged colloidal particles of :
What is the use of colloidal copper ?
Which of the following is absorbed efficiently in colloidal forms?
Soap solution is colloidal in nature and remove the dust particles by which of the following process?
Silver iodide is used for producing artificial rains because $AgI$:
To stop bleeding from an injury ferric chloride can be applied
Which comment about the statement is justified?