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Which of the following is magnetite ?...

Which of the following is magnetite ?

A

`Fe_(2)CO_3`

B

`Fe_(2)O_3`

C

`Fe_(3)O_(4)`

D

`Fe_(2)O_(3).3H_(2)O`

Text Solution

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The correct Answer is:
C
`Fe_(3)O_(4)` is magnetic.
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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-REVISION QUESTIONS FROM COMPETITIVE EXAMS.
  1. The least stable oxide at room temperature is

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  2. What is insoluble in water ?

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  3. Which of the following is magnetite ?

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  4. Refractory materials are generally used in furnaces because

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  5. Which of the following is an ore of aluminium ?

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  6. The method of zone relining of metal is based on the principle of AIFM...

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  7. Process of heating ore is air to remove sulphur is:

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  8. The formula of azurite is :

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  9. Heating of ore in presence of air to remove sulphure impurities is cal...

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  10. Vapour phase refining of nickel is carried out using

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  11. Thomas slag is

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  12. In Mc-Arthur Forrest method silver is extracted from the solution of N...

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  13. During the extraction of iron, slag produced is

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  14. Silver containing lead as an impurity is not purified by

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  15. Out of the following matals that cannot be obtained by electrolysis of...

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  16. In the froth floatation process for the facilitation of ores the ore ...

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  17. Mond's process is used for

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  18. In the extraction of Fe from Fe(2)O(3) the reducing agent is

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  19. deltaG^(o) vs T plot in the Ellingham's diagram slopes downaward for t...

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  20. Which of the following reactions taking place in the blast furnace dur...

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