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Out of haematite (Fe(2)O(3)) and iron py...

Out of haematite `(Fe_(2)O_(3))` and iron pyrites `(FeS_(2))`, which one is the ore of iron ?

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Haematite `(Fe_(2)O_(3))`.
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Formula of Haematite is Fe_(3)O_(4)

Why the symbol of iron is Fe?

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Which of the following ores cannot be concentrated by electromagnetic separation? Chromite (FeCr_(2)O_(4)), magnetite (Fe_(3)O_(4)) , zinc blende (ZnS) , pyrolusite (MnO_(2)) .

Haematite (Fe_(2)O_(3)) contains some water in addition to Fe_(2)O_(3) . 4.0 kg of this mineral contains 2.5 kg of iron. Find the purity of Fe_(2)O_(3) in the mineral.

Copper pyrites (Cu_(2)S.Fe_(2)S_(3)) is the ore of which element and why?

What chemical principle is involved in choosing a reducing agent for getting the metal from its oxide ore? Consider the metle oxides Al_(2)O_(3) and Fe_(2)O_(3) , and justify the choice of the reducing agent.

Between Cu^(2+) and Fe^(2+) , which one is more paramagnetic?

The composition of a sample of Wustite is Fe_(0.93)O_(1.00) . What fraction of iron is present in the from of Fe^(2+) ion ?

One of the reaction that takes place in producing steel from iron ore is the reduction of iron (II) oxide by carbon monoxide to give iron metal and CO_(2) . FeO(s)+CO(g)hArr Fe(s)+CO_(2)(g),K_(p)=0.265atm at 1050K. What are the equilibrium partial pressures of CO and CO_(2) at 1050K if the initial partial pressures are: p_(CO)=1.4 atm & p_(CO_(2))=0.80 atm?

CHHAYA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE )
  1. Give an example of each of the following : (a) a light metal

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  2. Give an example of each of the following : (b) a heavy metal

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  3. Out of haematite (Fe(2)O(3)) and iron pyrites (FeS(2)), which one is t...

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  4. What type of ores are generally roasted ? Why ?

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  5. Cu and Ag exist as sulphides though they occupy lower positions in the...

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  6. Why do some metals occur in the native state?

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  7. What type of ores are concentrated by electromagnetic separation?

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  8. If the impurities are lighter than the ore, mention the process of the...

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  9. Explain why the concentraction of the sulphide ore is usually carried ...

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  10. Name the chief ores of Cu, Fe and Al. What are the methods employed fo...

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  11. Metal sulphides occur mainly in rocks and metal halides in lakes and s...

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  12. Write the name of a suitable flux to remove SiO(2) present as gangue.

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  13. How are the elements occupying higher positions of the electrochemical...

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  14. Out of C and CO, which is a better reducing agent for FeO in the lower...

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  15. CO cannot be used for the reduction of ZnO- why?

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  16. How cany the feasibility of reduction of a metal oxide by a metal be p...

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  17. Name an alloy of Cu that is used for making utensils.

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  18. Name the gas used for the separation of Ni from impurities by Mond pro...

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  19. Explain why invar is used for making meter scale.

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  20. What is copper matte?

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