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The metal which mainly occurs as oxide ore in nature is :

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Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 8
The reason, for floating of ore particles in concentration by froth floatation process is that
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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 9

Choose the correct option using the code regarding the roasting process:

I It is the process of heating the ore in the air in a reverberatory furnace to obtain the oxide.

II It is an exothermic process.

III It is used for the concentration of sulphide ore.

IV It removes easily oxidisable volatile impurities present in the concentrated ore.

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 10
Select the correct statement for the decomposition of metal oxide into solid/liquid metal and oxygen?
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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 11
A sulphide ore ZnS is first roasted into its oxide prior to reduction by carbon because:
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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 12
Which of the following statements is correct regarding the slag obtained during the extraction of a metal like copper or iron ?
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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 13
The slag consists of molten impurities, generally, in the form of:
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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 14
In the metallurgy of iron, the upper layer obtained in the bottom of blast furnace mainly contains:
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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-2>Q 15
Which one of the following reactions occurs during smelting in the reduction zone at a lower temperature (in the top zone in a blast furnace in iron metallurgy)?