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Gold numbers of protective colloids A, B...

Gold numbers of protective colloids A, B, C and D are `0.50, 0.01, 0.10` and `0.005` respectively. The correct order of their protective powers is

A

`A lt C lt B lt D`

B

`B lt D lt A lt C`

C

`A lt A lt C lt B`

D

`C lt B lt D lt A`

Text Solution

Verified by Experts

The correct Answer is:
A
Smaller the gold number, greater is the protective power. Thus, protective powers of A, B, C and D are in the order
D `(0.005) gt B (0.001) gt C (0.05) gt A (0.50)`
or `A lt C lt B lt D.`
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