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Among the following statements, the inc...

Among the following statements, the incorrect one is

A

Calamine and siderite are carbonates

B

Argentite and cuprite are oxides

C

Zinc blende and pyrites are sulphides

D

Malachite and azurite are ores of copper

Text Solution

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The correct Answer is:
B
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NARAYNA-METTALURGY-Single Answer Questions
  1. Which of the following reaction is an example of autoreduction?

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  2. Brine is electrolysed by using inert electrodes. The reaction at anode...

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  3. Among the following statements, the incorrect one is

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  4. The addition of high proportions of maganese makes steel useful in mak...

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  5. When the ore haematite is burnt in air with coke around 2000 K along w...

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  6. In the commercial electrochemical process for aluminium extraction, th...

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  7. In the elactrolytic extraction of aluminium, cryolite is used.

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  8. Extraction of silver from Ag(2)S by the use of sodium cyanide is examp...

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  9. The chemical processes in the production of steel from haematite ore i...

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  10. The chemical composition of slag formed during the smelting process in...

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  11. In the metallurgy of iron, when limestone is added to the blast furnac...

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  12. Which of the following process is used in the extractive metallurgy of...

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  13. Identify the metal M whose extraction is based on the following reacti...

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  14. In the process of extraction of gold, Roasted gold ore +CN^(-)+H2Oov...

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  15. Two ores A1 and A2 of a metal M show the following reactivity: A...

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  16. Pb and Sn are exerted from their chief ores by:

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  17. Which ore contains both iron and copper?

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  18. Match the extraction processes listed in column I with metals listed i...

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  19. Extraction of zinc from zinc blende is achieved by:

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  20. Black tin is

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