Gold numbers of protective colloids A,B,C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is

  • Option 1)

    B< D< A< C

  • Option 2)

    D< A< C<B

  • Option 3)

    C<B< D< A

  • Option 4)

    A<C<B< D

 

Answers (1)

As we learnt in 

Gold Number \propto \frac{1}{Protective Power of Colloid}

Gold Number \propto \frac{1}{Protective Power}

Since Gold Number is 

A> C> B> D

Hence Protective Power is 

A< C< B< D


Option 1)

B< D< A< C

This option is Incorrect. 

Option 2)

D< A< C<B

This option is Incorrect. 

Option 3)

C<B< D< A

This option is Incorrect. 

Option 4)

A<C<B< D

This option is Correct. 

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