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Of the following metals that cannot be o...

Of the following metals that cannot be obtained by electolysis of the aqueous solultion of their salts is /are

A

Ag

B

Mg

C

Cu

D

Al and Mg

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The correct Answer is:
D
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. The chemical reagent used for leaching of gold and silver ores is

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  2. Name the metal M, which is extracted based on the following equation ...

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  3. Of the following metals that cannot be obtained by electolysis of the ...

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  4. Which of the following process is used in the extractive metallurgy of...

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  5. In the Bayer's process of purification of red hauxite the leaching age...

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  6. Chemical leaching is useful in the concen-tration of

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  7. The electrolytic reduction method for the preparation of aluminium is ...

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  8. During the electrolytic reduction of alumina, the reaction at cathode ...

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  9. Coinage alloy contains copper. The other metal present may be

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  10. Alloy used in making anchors, bolts, chains and wires

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  11. (A) : Cassiterite mineral is concentrated by electromagnetic method ...

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  12. (A) Efficiency of the reverboratary furnace is less (R) The waste...

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  13. (A): In the smelting of copper pyrites in blast furace, Cu(2)S formed ...

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  14. (A): Iron pyrate is used in the extraction of iron releases pollutants...

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  15. (A) Reduction of a metal oxide is easier if the metal formed is in liq...

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  16. (A): Leaching is chemical method used to ore benefication process (R...

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  17. (A): Hydrated oxides are usually subjected to roasting (R) : Hydrate...

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  18. (A): Levigation is used for the separation of oxide ores from impuriti...

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  19. (A): High purity gallium for semiconducting purpose can be obtained by...

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  20. (A): Copper metal can be extracted by electrolysis even from aqueous s...

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