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The gold number of a faw protective colloide are given
`x = 0.005, y = 3.5, z = 40`
The protective nature to these colloidal solutions follow the order:
A. `z gt x gt y`
B. `x lt y lt z `
C. `z gt y gt x `
D. `x gt y gt z`

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Correct Answer - D
Smaller the gold number is its protective power , Hence, the order would be
`x gt y gt z`
Gold number is used for calculating the protective powers of lyophilic colloids.

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