JEE Main Chemistry question

Not in JEE Main or NEET syllabus

In which of the following reactions are colloids not prepared by the double decomposition method?

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

Options (A), (B) and (C) are all metathesis (double decomposition) reactions in which two compounds exchange partners to precipitate a colloidal product (, Prussian blue, and HgS respectively, from

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Question ID VK-144914