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The incorrect statement among the follow...

The incorrect statement among the following is

A

Hydrogen is used to reduce NiO

B

Zirconium is refined by Van Arkal method

C

The sulphate ore galena is concentrated by froth floatation

D

In the metallurgy of iron, flux used in `SiO_2`

Text Solution

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The correct Answer is:
D
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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-REVISION QUESTIONS FROM COMPETITIVE EXAMS.
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  3. The incorrect statement among the following is

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  4. Which of the following is used in thermine welding ?

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  5. Which of the following methods is used for obtaining Aluminium metal ?

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  6. According to Ellinigliam diagram, the oxidation reaction of carbon to ...

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  7. In the equation , 4M + 8CN^(-) + 2H(2)O + O rarr 4[M(CN)2]^(-) + 4OH^(...

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  8. Oxidation states of the metal in the mineral haematite and magnetite ,...

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  9. Which of the following does not occur as sulphide ore. ?

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  10. Calamine is an ore of

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  11. Bauxite has composition

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  12. Which of the following statements is false ?

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  13. In view of the sign of delta(n)G^(o) for the following reaction : Pb...

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  14. The following reactions take place in the blast furnace in the prepara...

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  15. Which of the following elements is present as the impurity to the maxi...

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  16. Which of the following pairs of metals is purified by Van Arkel method...

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  18. During electrolytic refining of copper some metals , present as impuri...

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  19. Aluminium is extracted from Alumina (Al(2)O3 ) by electrolysis of a mo...

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  20. In the extraction of copper from its sulphide ore, the metal is finall...

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