Which of the following is/are correct statements \( \mathrm{P} \) (A) Hardy Schulz rule is relat...

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Which of the following is/are correct statements
\( \mathrm{P} \)
(A) Hardy Schulz rule is related to coagulation
W.
(B) Brownian movement and Tyndall effect are shown by colloids
(C) When liquid is dispersed in liquid, it is called gel.
(D) Gold number is a measure of protective power of lyophillic colloid.
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