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select the correct statement (s) :

A

A sol is prepared by addition of excess of `AgNO_(3)` solution in Kl solution . The charge likely to develop on colloidal particle is positive

B

the effects o pressure on physical adsortion is high if temperature is low

C

Ultracentrifugation process is used for pegaration of colloids

D

Gold number is the index for extent of gold plating done

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The correct Answer is:
a,b,d
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