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The ore that contains both iron and copp...

The ore that contains both iron and copper is :

A

malachite

B

dolomite

C

azurite

D

copper pyrites

Text Solution

Verified by Experts

The correct Answer is:
D
Copper pyrites : `CuFeS_2`
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Two solid spheres of same size, of one iron and other of copper, are suspended by strings and submaerged in a beaker containing a certain liquid (the density of liquid is less than that of both iron and copper). If the density of copper is greater than that of iron, which of the following statements are true? (a) The upthrust on copper sphere is greater than that on the iron sphere. Upthrust is equal on both spheres. (c) Tension in the string supporting copper sphere is greater than that in the string supporting iron sphere. (d) Tension in both the strings is equal.

Which of the following ore do not contain iron (do not consider any impurity in ore)?

MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-COMPETION FILE (Objective Questions) (Multiple Choice Question from competitive examinations)
  1. Electrolytic refining's is ued to purify which of the following metals...

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  2. the common impurities present in bauxite are

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  3. Carnallite is an ore of

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  4. Which of the following is not a mineral of iron?

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  5. The one that is not a carbonate ore is:

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  6. Match the refining methods (Column I) with metals (Column II).

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  7. The correct statement is :

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  8. The pair that does NOT require calcination is :

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  9. The reaction that does NOT define calcination is :

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  10. Match the ores (Column A) with the metals (Column B) :

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  11. in the Hall -Heroult process, aluminium is formed at the athode , ...

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  12. The correct statement is

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  13. Assertion : For the extraction of iron, haematite are is used. Reaso...

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  14. The ore that contains both iron and copper is :

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  15. Hall-Heroult's process is given by :

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  16. Extraction of zinc from zinc blende is achieved by:

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  17. Oxidation states of the metal in the minerals haematite and magnetite ...

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  18. In the cyanide extraction process of silver from argentite ore, the ox...

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  19. Sulphide ores are common for the metals

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  20. Calamine, malachite, magnetite and cryolite, respectively, are

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