Class 12ChemistryGeneral Principles and Processes of Isolation of ElementsMix Examples of General Principles and processes of Isolation of Elements
EasyWhat are the metals and their approximate percentages in German silver?
- A$Cu(52\%), Ni(25\%), Zn(18\%), Fe(5\%)$
- B$Cu(60\%), Ni(40\%)$
- C$Ni(60\%), Fe(25\%), Cr(15\%)$
- D$Cu(50\%), Ni(25\%), Zn(25\%)$
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Similar Questions
Which of the following reactions is $NOT$ entropy-driven with reference to extractive metallurgy? (unbalanced reactions)
Medium
View SolutionMatch List-$I$ with List-$II$ (Both having metallurgical terms):
List-$I$ List-$II$ $A$. Concentration of $Ag$ ore $I$. Reverberatory furnace $B$. Blast furnace $II$. Pig iron $C$. Blister copper $III$. Leaching with dilute $NaCN$ solution $D$. Froth floatation method $IV$. Sulfide ores
Choose the correct answer from the options given below:
| List-$I$ | List-$II$ |
|---|---|
| $A$. Concentration of $Ag$ ore | $I$. Reverberatory furnace |
| $B$. Blast furnace | $II$. Pig iron |
| $C$. Blister copper | $III$. Leaching with dilute $NaCN$ solution |
| $D$. Froth floatation method | $IV$. Sulfide ores |
Choose the correct answer from the options given below:
DifficultJEE MAIN 2021
View SolutionThomas slag is used in
Easy
View SolutionWhich alloy contains $Cu$,$Sn$ and $Zn$?
Easy
View SolutionColumn-$I$ Column-$II$ $A$. Metal which occurs in the native state in nature is $P$. $Hg$ $B$. The oxide of metal that can be commercially reduced by Aluminothermic reduction process is $Q$. $Ti$ $C$. van Arkel method is used for preparing ultrapure metal of $R$. $Cr$ $D$. Auto reduction process is employed for the sulphide ore of $S$. $Ag$
| Column-$I$ | Column-$II$ |
| $A$. Metal which occurs in the native state in nature is | $P$. $Hg$ |
| $B$. The oxide of metal that can be commercially reduced by Aluminothermic reduction process is | $Q$. $Ti$ |
| $C$. van Arkel method is used for preparing ultrapure metal of | $R$. $Cr$ |
| $D$. Auto reduction process is employed for the sulphide ore of | $S$. $Ag$ |
Medium
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