A) \[D<A<C<B\]
B) \[C<B<D<A\]
C) \[A<C<B<D\]
D) \[B<D<A<C\]
Correct Answer: C
Solution :
Smaller the value of gold number, greater will be-protective power of the protective colloid. Protective power of a colloid \[\propto \frac{1}{gold\,number}\] Hence, the correct order is\[A<C<B<D\].
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