Q83 / 200 · NEET 2012 (Screening) · Chemistry

The protecting power of lyophilic colloidal sol is expressed in terms of

  • A
    coagulation value
  • Correct answer
    B
    gold number
  • C
    critical micelle concentration
  • D
    oxidation number

Solution

Lyophobic sols are unstable, so they are stabilised by adding some lyophilic colloids which protect them from precipitation. Thus, lyophilic colloids are called protecting colloids. Their protecting power is expressed in terms of gold number. Note Lesser the gold number, higher is the protecting power.

Hence, the correct answer is option: 'B'.

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