Which of the following is the best protective colloid?

Which of the following is the best protective colloid?

  1. A

    Gelatin (GoldNo. = 0.005)

  2. B

    Gum arabic (Gold No. = 0.15)

  3. C

    Egg albumin (Gold No. = 0.08)

  4. D

    All possess same protective power

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    Solution:

    Lower is the gold number, higher will be the protective power. Thus, gelatin has maximum protective power

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