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The usual collodion is a solution of ni...

The usual collodion is a ______ solution of nitrocellulose in a mixture of alcohol and ether.

A

`6%`

B

`7%`

C

`4%`

D

`5%`

Text Solution

Verified by Experts

The correct Answer is:
C
It is used to make ultra-filters paper is prepared by soaking the filter paper in collodion solution, hardening by formaldehyde and then finally drying it.
By using ultra-filter paper, the colloidal particles are separated from rest of the materials. Ultra-filtration is a slowl process. To speed up the process, pressure or suction is applied. The colloidal particles left on the ultra-filter paper are then strred with fresh dispersion medium (solvent) to get a pure colloidal solution.
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