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Which of the following is correct about ...

Which of the following is correct about calcination ?

A

`1`. Carbonate ores are converted into oxides

B

`2`. Ore is decomposed

C

`3`. Moisture is eliminated from the ore

D

`4`. All the above

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VGS PUBLICATION-BRILLIANT-PRINCIPLES OF METALLURGY-EXERCISE
  1. Active metals are not extracted by the electrolysis or aqueous electro...

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  2. Which of the following is wrong?

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  3. Which of the following is correct about calcination ?

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  4. Which of the following is true about preparation of Iron by smelting p...

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  5. Which of the following is true about the electrolytic refining of meta...

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  6. Aluminium is more reactive than Iron, but rate of corrosion in Iron is...

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  7. Which of the following method is used for purification of metals conta...

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  8. The electrolyte used in refinery of copper is

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  9. The main use of CaCl2 in laboratory is

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  10. Assertion (A) : Gold is available in nature in free state. Reason (R) ...

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  11. Metals are available in: i) free state ii) mixed state.

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  12. Assertion (A) : Bauxite is ore for Aluminium metal. Reason (R) : The m...

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  13. Assertion (A) : Oxygen - sulpher group in the periodic table is called...

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  14. The correct steps of process of metallurgy is i) purification of the m...

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  15. P: Extraction of the metal from Its ores depends on the physical prope...

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  16. Which of the following reduction is suitable for extraction of crude m...

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  17. P: Corrosion of iron is an oxidation process. Q : Corrosion occurs in...

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  18. Assertion (A) : Alloy metal does not undergo corrosion, Reason (R) : A...

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  19. Assertion (A) : Zn can be obtained by distillation method. Reason (R) ...

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  20. The product in the reduction of PbO with carbon is

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