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Name the three main varieties of iron. W...

Name the three main varieties of iron. Which out of them is the purest?

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The three main varieties of iron are:
(i) Cast iron (ii) Wrought iron (iii) Steel.
Out of three varieties, wrought iron is the purest.
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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. Name the purification method which involves vapour phase extraction.

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  2. Ultra pure silicon is needed by electronic industry. By which method o...

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  3. Name the three main varieties of iron. Which out of them is the purest...

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  4. What is the percentage of carbon in steel?

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  5. A crude metal is heated with iodine to form metal tetraiodide which is...

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  6. What is the principle of chromatographic separation ?

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  7. Name the most important ore of aluminium.

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  8. When bauxite ore contains considerable amount of silica as an impurity...

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  9. Name two alloys of aluminium and give their composition.

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  10. What is the composition of ignition mixture used in aluminothermy?

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  11. Which process is used to convert pure alumina into aluminium.

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  12. Why cryolite is mixed with alumina during its electrolysis?

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  13. What is the purpose of adding a small amount of CaF2 to alumina during...

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  14. Why aluminium acts as a good reducing agent?

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  15. What is anodised aluminium ?

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  16. What is malachite ?

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  17. List the name and formulae of two important ores of copper.

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  18. What is blister copper?

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  19. Give the composition of brass and German silver

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  20. What are the constituents of anode mud formed during electrolytic refi...

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