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A number of elements are available in ea...

A number of elements are available in earth’s crust but most abundant elements are_____________ .

A

Al and Fe

B

Al and Cu

C

Fe and Cu

D

Cu and Ag

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
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  2. Which of the following reactions is an example of auto reduction ?

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  3. A number of elements are available in earth’s crust but most abundant ...

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  4. Zone refining is based on the principle that .

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  5. In the extraction of copper from its sulphide ore, the metal is formed...

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  6. During the electrolysis of NaCl solution, the gas liberated at the ano...

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  7. An ore of aluminium is

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  8. Electrolytic refining is used to purify which of the following metals ...

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  9. Extraction of gold and silver involves leaching the metal with CN^- io...

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  10. Answer the question on the basis of figure given below : Choose th...

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  11. Answer the question on the basis of figure given below : Below poi...

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  12. Answer the question on the basis of figure given below : For the r...

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  13. In the following questions two or more options may be correct. At the ...

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  14. In the following questions two or more options may be correct. Which o...

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  15. In the extraction of aluminium by Hall-Heroult process, purified Al2O3...

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  16. Which of the following statements is correct ?

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  17. In the Froth Floatation process, zinc sulphide and lead sulphide can b...

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  18. Common impurities present in bauxite are .

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  19. Which of the following ores are concentrated by froth floation ?

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  20. Which of the following reactions occur during calcination?

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