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Incorrect statement among the following ...

Incorrect statement among the following is -

A

roasting of the sulphide ores is thermodynamically feasible

B

Zn metal is used to extract Au from [Au(CN)_2]^-

C

carbon anode is consumed in hall-Heroult process for extraction of aluminium

D

carbon and hydrogen are suitable reducing agent for metal sulphide

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AAKASH INSTITUTE-TEST 5-EXAMPLE
  1. The pair of coloured species in the following is -

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  2. When excess of silver nitrate is added to to 200 ml of of 0.05M [Cu(NH...

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  3. Incorrect statement among the following is -

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  4. In the extraction of copper the metal is obtained by the reduction of ...

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  5. Complex formed during the hydrometallurgy of Ag ore is/are -

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  6. π- bond is not present in -

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  7. Coordination number and oxidation state of metal M in the complex [M(N...

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  8. The hybridisation of Ag in [Ag(NH3)2]^+complex is -

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  9. The ambidentate ligand among the following is -

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  10. Which of the following salt solution will impart greenish colour?

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  11. Incorrect statement for transition element is -

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  12. The correct order of first ionization energy is -

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  13. The metal ions having 3d^2 configuration is/are(Ti=22, V=23, Cr=24, Mn...

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  14. Sodium metal is extracted by the electrolysis of -

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  15. Self reduction process cannot be used for the extraction of -

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  16. Which of the following is not an oxide ore?

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  17. Van Arkel method is used for the refining of -

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  18. Chalcopyrites is an ore of

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  19. A certain gas takes half of the time to effuse out as taken by Ne gas ...

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  20. Amount of oxygen gas present in a 2 L vessel at 5 atm pressure and 27°...

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