(a)The rate constant for a reaction of zero order in A is $0.0030\;mol L^{-1}S^{-1}$ How long will it take for the initial concentration of A to fall from $0.10\;M$ to $0.075\;M$ ? (b)What type of colloidal sols are formed in the following : (i) Sulphur vapours are passed through colled water (ii) White of an egg is mixed with water . (iii) Soap solution

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