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General Principles and processes of Isolation of Elements
medium
For the following statements, mark $'T'$ for true and $'F'$ for false statement.
Statement $1$ : $SnO_2$ $+$ wolframite, in this $SnO_2$ is magnetic while wolframite is non magnetic in nature.
Statement $2$ : Argentite ore is concentrated by froth floatation method.
Statement $3$ : Copper and lead ores are reduced by self reduction method.
Statement $4$ : In metallurgy of $Fe,\,CO$ is used as reducing agent at low temperature
A
$T T T F$
B
$F F F T$
C
$F F T T$
D
$T T F F$
Solution
$\underset{\begin{smallmatrix}
\,\,\,\,\,non \\
magnetic
\end{smallmatrix}}{\mathop{Sn{{O}_{2}}}}\,\,+\,\underset{magnetic}{\mathop{\,Wolframite}}\,$
$A{g_2}S\, \to $ Leaching
Standard 12
Chemistry
Similar Questions
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.
