JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which of the following is the best protective colloid?

(A)Gelatin (Gold number = 0.005)Correct
(B)Gum Arabic (Gold number = 0.15)
(C)Egg albumin (Gold number = 0.08)
(D)None of the above

Answer: (A)

Solution

Protective power is inversely proportional to gold number, so the colloid with the smallest gold number offers the greatest protection. Among the given

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Question ID VK-144757