Which of the following reactions is not used for the preparation of a colloidal solution?

2 A u {C l}_{3} + 3 S n {C l}_{2} ⟶ 3 S n {C l}_{4} + 2 A u

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F e {C l}_{3} + 3 H_{2} O ⟶ F e {(O H)}_{3} + 3 H C l

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2 M g + {C O}_{2} ⟶ 2 M g O + C

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2 H_{2} S + 2 S O_{2} ⟶ 2 H_{2} O + 3 S

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Solution

The correct option is C $2 M g + {C O}_{2} ⟶ 2 M g O + C$
$2 M g + C O_{2} \to 2 M g O + C$ does not produce any colloidal solution, whereas the other three reactions produce Gold sol, ferric hydroxide sol and sulphur sol.

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Similar questions

F e (O H)_{3}

F e C l_{3}

2 H_{2} S + S O_{2} \to 3 S + 2 H_{2} O

S O_{2} + 2 H_{2} S \to 3 S + 2 H_{2} O

S O_{2} + 2 H_{2} S ⟶ 3 S + 2 H_{2} O

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