Class 12ChemistryGeneral Principles and Processes of Isolation of ElementsMix Examples of General Principles and processes of Isolation of Elements
EasyThe statement that is $NOT$ correct is:
- ACollectors enhance the wettability of mineral particles during froth flotation.
- BCopper from its low grade ores is extracted by hydrometallurgy.
- C$A$ furnace lined with Haematite is used to convert cast iron to wrought iron.
- DIn vapour phase refining,metal should form a volatile compound.
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View SolutionRailway wagon axles are made by heating rods of iron embedded in charcoal powder. The process is known as
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View SolutionMatch items of Column-$I$ with the items of Column-$II$ and assign the correct code :
Column $I$ Column $II$ $A$. Cyanide process $i$. Ultrapure $Ge$ $B$. Froth floatation $ii$. Dressing of $ZnS$ $C$. Electrolytic reduction $iii$. Extraction of $Al$ $D$. Zone refining $iv$. Extraction of $Au$ $v$. Purification of $Ni$
| Column $I$ | Column $II$ |
| $A$. Cyanide process | $i$. Ultrapure $Ge$ |
| $B$. Froth floatation | $ii$. Dressing of $ZnS$ |
| $C$. Electrolytic reduction | $iii$. Extraction of $Al$ |
| $D$. Zone refining | $iv$. Extraction of $Au$ |
| $v$. Purification of $Ni$ |
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View SolutionWhich of the following reactions does not occur in the Bessemer converter?
Medium
View SolutionAmong the reactions $(a) - (d)$,the reaction$(s)$ that does/do not occur in the blast furnace during the extraction of iron is/are:
$(a)$ $CaO + SiO_2 \rightarrow CaSiO_3$
$(b)$ $3 Fe_2O_3 + CO \rightarrow 2 Fe_3O_4 + CO_2$
$(c)$ $FeO + SiO_2 \rightarrow FeSiO_3$
$(d)$ $FeO \rightarrow Fe + \frac{1}{2} O_2$
$(a)$ $CaO + SiO_2 \rightarrow CaSiO_3$
$(b)$ $3 Fe_2O_3 + CO \rightarrow 2 Fe_3O_4 + CO_2$
$(c)$ $FeO + SiO_2 \rightarrow FeSiO_3$
$(d)$ $FeO \rightarrow Fe + \frac{1}{2} O_2$
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