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In view of the sign of Deltar G^@ for th...

In view of the sign of `Delta_r G^@` for the following reactions : `PbO_2 + Pb rarr 2PbO, Delta_r G^@ < 0` `SnO_2 + Sn rarr 2SnO, Delta_r G^@ > 0` which oxidation states are more characteristic for lead and tin ?

A

For lead + 2, for tin + 2

B

For lead + 4, for tin + 4

C

For lead + 2, for tin + 4

D

For lead + 4, for tin + 2

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. is a mixture of solution of copper sulphate and lime which is used as ...

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  2. Heating mixture of Cu2O and Cu2S will give :

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  3. In view of the sign of Deltar G^@ for the following reactions : PbO2 +...

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  4. State whether the statement is true or false- Baking powder is used to...

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  5. In the context of the Hall-Heroult process for the extraction of Al, ...

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  6. Which one of the following ore is best concentrated by froth floatatio...

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  7. Delta G^@ vs T plot in the Ellingham's diagram slopes downward for the...

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  8. Identify the reaction that does not take place in a blast furnace :

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  9. If C and D are two events such that CsubD""a n d""P(D)!=0 , then the c...

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  10. In aluminothermic process, Al is used as

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  11. State the role of silica in the metallurgy of copper.

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  12. In the electrolytic refining of zinc, ............

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  13. According to Ellingham diagram, the oxidation reaction of carbon to c...

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  14. formula of copper sulphate

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  15. From the Ellingham graphs on carbon, which of the following statements...

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  16. The function of potassium ethyl xanthate in froth floatation process i...

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  17. Magnetic separation is used in the concentration of: Copper pyrites, C...

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  18. When limestone is heated, CO2 is given off. The metallurgical operatio...

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  19. The statement that is not correct is

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  20. Match the metal in Column I with the ores in Column II

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