The gold numbers of protective colloids $$A, B, C$$ and $$D$$ are 0.04, 0.004, 10 and 40 respectively. The protective powers of $$A, B, C$$ and $$D$$ are in the order :
A.
$$A > B > C > D$$
B.
$$B > A > C > D$$
C.
$$D > C > A > B$$
D.
$$D > C > B > A$$
Answer :
$$B > A > C > D$$
Solution :
Smaller is the 'gold number' of protective colloid, greater is its protective power.
Releted MCQ Question on Physical Chemistry >> Surface Chemistry