Question

Collodion is a .
A. colloidal sol of cellulose nitrate in water.
B. colloidal sol of cellulose acetate in ethyl alcohol.
C. colloidal sol of cellulose nitrate in ethyl alcohol.
D. colloidal sol of cellulose acetate in water.

Answer 1

Collodion is flammable and is a colorless solution of nitrocellulose. It is a mixture of pyroxylin in ether and alcohol. It is used as an adhesive to treat small wounds and hold surgical dressings.

Complete step by step answer:
We know that collodion is a four percent mixture of a solution of nitrocellulose. It is a solution of pyroxylin in ether containing a variable amount of alcohol. As we know cellulose nitrate can be dissolved in ether. So a mixture of ether was used as a solvent and ethyl alcohol as a diluent that condensed cellulose nitrate into a gelatinous liquid.
Cellulose acetate is the acetate ester of cellulose. It is also called acetylated cellulose or xylonite. It is a modified fiber having two or more hydroxyl groups. So this option is incorrect.
Therefore from the above statements, we infer that colloidal is the colloidal sol of cellulose nitrate in ethyl alcohol.

So, the correct answer is Option C.

Additional information:
Collodion is of two types: flexible and non -flexible. The non-flexible one is used for theatrical makeup. It is insoluble in water and has a flashpoint of approximately zero F.

Note: Nitrocellulose also referred to as pyroxylin(cellulose nitrate) is a highly flammable compound formed by nitration of cellulose through exposure to nitric acid. It is a mild explosive used in rockets, propellants, and celluloid. Also, certain types of nail polish have collodion in them and it is also used to glue electrodes to the head for electroencephalography.