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In the isolation of metals, calcination ...

In the isolation of metals, calcination process usually results in:

A

metal hydroxide

B

metal sulphide

C

metal oxide

D

metal carbonate

Text Solution

Verified by Experts

The correct Answer is:
C
Calcination is the process of converting an ore into its oxide by heating it strongly below its melting point either by heating it strongly below its melting point either in absence or limited supply of air . It is usually done to convert metal carbonates and hydrogen to their respecitive oxides .
` underset( "Limestone ") (CaCO_3) overset(Delta)to underset( "calcium oxide ") (CaO +CO_2 uarr )`
` underset( "malachite ") ( CuCO_3 .Cu (OH)_2 overset(Delta)to 2Cu O+ H_2 O uarr +CO_2 uarr `
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  2. Consider the following reactions : 2XS+3O(2)overset(Delta)to 2XO+2SO...

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  3. XCl(2)("excess")+Ycl(2) to XCl(4)+Y darr , YO underset(gt400^(@))ove...

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  4. All ores are minerals while all minerals are not ores because :

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  5. Consider the following reaction at 1000^(@)C (A) Zn (s) + (1)/(2) O...

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  6. Correct match is:

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  7. Select correct statement:

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  8. By which process Pb and Sn are extracted respectively are:

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  9. Which of the following faction is of no significance for roasting sul...

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  10. When copper pyrites is roasted in excess of air, a mixture of CuO + Fe...

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  11. Sulphide ores of metals are usually concentrated by both floatation pr...

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  12. Calcination is the process in which

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  13. Extraction of zinc from zinc blende is achieved by

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  14. In froth flotation process many chemicals (frother, collector, activat...

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  15. In the metallurgy of Zn the Zn dust obtained from roasting and reducti...

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  16. A sulphide ore is first converted into its oxide before reduction. Thi...

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  17. Carbon and CO gas are used to reduce which of the following pairs of m...

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  18. While extracting an element from its ore, the ore is grind and leached...

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  19. Consider the following statements - In the aluminothermite process,...

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  20. Which statement is correct?

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  21. Aluminium is prepared in large quantities by

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