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General Principles and processes of Isolation of Elements
hard
Match List $- I$ with List $- II.$
| List $-I$ (Colloid Preparation Method) | List $-II$ (Chemical Reaction) |
| $(a)$ Hydrolysis | $(i)\;2 \mathrm{AuCl}_{3}+3 \mathrm{HCHO}+3 \mathrm{H}_{2} \mathrm{O}\rightarrow\;{2 \mathrm{Au}(\mathrm{sol})+3 \mathrm{HCOOH}+} {6 \mathrm{HCl}}$ |
| $(b)$ Reduction | $(ii)\;\mathrm{As}_{2} \mathrm{O}_{3}+3 \mathrm{H}_{2} \mathrm{S} \rightarrow \mathrm{As}_{2} \mathrm{S}_{3}(\mathrm{sol})+3 \mathrm{H}_{2} \mathrm{O}$ |
| $(c)$ Oxidation | $(iii)\;\mathrm{SO}_{2}+2 \mathrm{H}_{2} \mathrm{S} \rightarrow 3 \mathrm{S}(\mathrm{sol})+2 \mathrm{H}_{2} \mathrm{O}$ |
| $(d)$ Double Decomposition | $(iv)\;\mathrm{FeCl}_{3}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow\mathrm{Fe}(\mathrm{OH})_{3}(\mathrm{sol})+3 \mathrm{HCl}$ |
Choose the most appropriate answer from the options given below.
A
$(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)$
B
$(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)$
C
$(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)$
D
$(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)$
(JEE MAIN-2021)
Solution
According to type of reactions for preparation, colloids have been classified
Standard 12
Chemistry
