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General Principles and processes of Isolation of Elements
easy
Bayer's process is used for purification of Bauxite containing as a major impurity
A
Haematite
B
Silica
C
Rutile
D
None of these
Solution
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Standard 12
Chemistry
Similar Questions
Match Column $-I$ with Column $-II$ and select the correct answer using the codes given below.
| Column $-I$ | Column $-II$ |
| $(i)$ Iron and copper | $(P)$ Poling |
| $(ii)$ Zirconium and Titanium | $(Q)$ Bessemerisation |
| $(iii)$ Lead and Tin | $(R)$ Van – arkel |
| $(iv)$ Copper and Tin | $(S)$ Liquation |
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.
