Calamine is an ore of...

Calamine is an ore of

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(1) Metals occur in the native form because of their (a) High electronegativity (b) Low reactivity ( c) Low density (d) High reactivity (2) Specific gravity of slag is (a) Higher than molten metal (b) Same as that of molten metal ( c) Less as that of molten metal (d) None of the above (3) Which process is used for the extraction of metals from their sulphide ores ? (a) Smelting Froth flotation ( c) Electrolysis (d) Metal displacement (4) Calamine is an ore of (a) Hg (b) Zn ( c) Ca (d) Cd (5) Non-fusible impurities of ores removed by adding Slag (b) Flux ( c) Gangue (d) None (6) Common method of extraction of metals from oxide ore involves. (a) Reduction with aluminium (b) Reduction with carbon Reduction with hydrogen (d) Electrolytic method (7) Smelting is the reduction of oxide to metal by (a) Carbon (b) Hydrogen ( c) Aluminimum (d) Electric current During froth flotation process, commonly used frother is. (a) CuSO_(4) (b) NaCN + alkali ( c) Pine oil (d) Potassium xanthate (9) Iron ores are dressed by (a) Froth flotation process (b) Hand picking ( c) Magnetic separation (d) All of the above (10) Silicon is the main constituent of (a) Alloys (b) Rocks ( c) Animals Plants.

Calamine ore can be converted into zinc oxide by the process of:

Calamine ore can be used to extract one of the following metals. This metal is:

Concentrated ore, calamine is heated to get metal oxide and the volatile impurities escapes away. This process is called

Every mineral is an ore, but every ore is not a mineral.

MARVEL PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Test Your Grasp

Calamine is an ore of
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Iron is removed from cahalcopyrite as
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Which of the following oxide cannot be reduced to metal by carbon ?
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Brine solution on electrolysis will not give.
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Which of the following steps are involved in hydrometallurgical proces...
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Which method is not correct for refining of crude metals ?
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Smelting involves reduction of metal oxide with
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Which of the following srtatement above the advantage of masting of su...
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The principal reaction in the zone of heat absorption of blast furnace...
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Iron is mainly extracted by .
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Electrolytic reduction of alumina to aluminium by Hall-Heroult process...
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Froth floatation process may be used to increase the concentration of ...
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In the metallurgy of iron, the upper layer obtained in the bottom of b...
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A mineral is known as an ore of metal if the metal
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Froth floatation process is used for the metallurgy of
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(viii) Amongest the following groups of oxides, the group containing o...
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In metallurgical processes the flux used for removing acidic impuritie...
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Roasting is done generally in case of
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The most common method of extraction of metals from oxide ores involve
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Froth floatation process for the concentration of sulphide ore is an i...
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