Which of the following is not lyophobic colloid? (1) Gold sol (2) \( \mathrm{As}_{2} \mathrm{~S}...

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Which of the following is not lyophobic colloid?
(1) Gold sol
(2) \( \mathrm{As}_{2} \mathrm{~S}_{3} \) sol
(3) Starch sol
(4) \( \mathrm{Fe}(\mathrm{OH})_{3} \) sol
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