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Match the items of Column I with the ite...

Match the items of Column I with the items of Column II and assign the correct code:
`{:(ColumnI,ColumnII),((A)"Sapphire",(1)AI_(2)O_(3)),((B)"Sphalerite",(2)NaCN),((C)"Depresant",(3)Co),((D)"Corundum",(4)ZNS),(,(5)Fe_(2)O_(3)):}`

A

A (3) B (4) C (2) D (1)

B

A (5) B (4) C (3) D (2)

C

A (2) B (3) C (4) D (5)

D

A (1) B (2) C (3) D (4)

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ALLEN-METALLURGY-EXERCISE -04
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  2. Why are sulphide ores converted to oxide before reduction?

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  3. Which method is used for refining Zr and Ti? Explain with equation.

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  4. What should be the considerations during the extraction of metals by e...

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  5. What is the role of flux in metallurgical processes?

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  6. How are metals used as semiconductor refined? What is the principle of...

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  7. Write down the reactions taking place in Bast furnace related to the m...

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  8. Give to requirements for vapour phase refining.

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  9. Write the chemical reaction involved in the extraction of gold by cyan...

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  10. Match the items of column I with items of column II and assign the cor...

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  11. Match the items of Column I with the items of Column II and assign the...

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  12. Match items of Column I with the items of Column II and assign the co...

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  13. Match the items of Column I with the items of Column II and assign the...

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  14. Match the items of Column I with items of Column II and assign the cor...

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  15. Assertion : Nickel can be purified by Mond process. Reason : NI(CO)(...

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  16. Assertion : Zirconium can be purificed by Van Arkel method. Reason :...

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  17. Assertion : Sulphide ores are concentarted by Froth Flotation method. ...

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  18. Assertion : Zone refining method is very useful for producing semicond...

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  19. Assertion : Hydrometallurgy involves dissolving the ore in a suitable ...

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  20. Explain the following (a) CO(2) is a better reducing agent below 7...

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