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  • Question 1
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    Directions For Questions

    The Ellingham diagram for zinc, magnesium and carbon converting into corresponding oxides is shown above. In the diagram, the points shown are melting and boiling points of zinc and magnesium metals. $$\Delta G^o$$ is a function of temperature for some reactions of extractive metallurgy.

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    At temperature $$1000^oC$$, $$\Delta G$$ of the reaction $$ZnO+C\rightarrow Zn+CO$$ is _________.

  • Question 2
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    Which one of the following statements is incorrect?

  • Question 3
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    Which of the above given curves is wrongly presented?

  • Question 4
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    Directions For Questions

    The Ellingham Diagram for a number of metallic sulphides is reproduced below :

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    Which occurs to minimum extent in nature?

  • Question 5
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    Directions For Questions

    Questions given below are based on the given diagram for extraction metallurgy.
    The points noted by arrows are the melting and boiling points of the metals zinc and magnesium. $$\Delta G^{\small\circ}$$ is a function of temperature for some reactions and extractive metallurgy.

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    At what approximate temperature, zinc and carbon have equal affinity for oxygen?

  • Question 6
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    Which of the above metal oxide has the minimum thermal decomposition temperature?

  • Question 7
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    Directions For Questions

    The Ellingham diagram for zinc, magnesium and carbon converting into corresponding oxides is shown below :

    ...view full instructions

    To make the following reduction process spontaneous, temperature should be:
        

         $$ZnO + C \longrightarrow Zn + CO$$

  • Question 8
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    Directions For Questions

    The Ellingham diagram for zinc, magnesium and carbon converting into corresponding oxides is shown below :

    ...view full instructions

    At $$1100^{\small\circ}C$$, which reaction is spontaneous to a maximum extent?

  • Question 9
    1 / -0

    Directions For Questions

    The Ellingham diagram for zinc, magnesium and carbon converting into corresponding oxides is shown above. In the diagram, the points shown are melting and boiling points of zinc and magnesium metals. $$\Delta G^o$$ is a function of temperature for some reactions of extractive metallurgy.

    ...view full instructions

    To make the following reduction process spontaneous, temperature should be 
    $$ZnO+C\xrightarrow {\Delta} Zn+CO$$

  • Question 10
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    Which of the above given metal oxides can be reduced by $$Fe$$ (reducing agent) to its respective metal  at temperature $$T_1$$?

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