Which of the following statements are co...

Which of the following statements are correct?

The protective power of a colloid may be measured by reciprocal of gold number

A gel is a colloidal system in which a solid is dispersed in a liquid.

For positively charged sol, the coagulating power of coagulating ion decreases as : `PO_4^(3-) gt SO_4^(2-) gt Cl^(-)`

In colloids, the particles constituting the dispersed phase adsorb only those ions preferentially which are opposite with the own lattice ions.

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