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General Principles And Processes of Isolation Of Elements

Short Answer Type

11.

Why is zinc not extracted from zinc oxide through reduction using CO?

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12.

Out of C and CO, which is a better reducing agent for ZnO?

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13.

What is the role of graphite rod in the electrometallurgy of aluminium?

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14.

Predict conditions under which Al might be expected to reduce MgO.

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15.

Define the term gangue or matrix.

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16.

Define the term flux.

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17.
Deine the term slag.

During metallurgy 'Flux’ is added which combines with ‘gangue’ to form ‘slag’. Slag separates more easily from the ore than the gangue. Slag is fusible mass, which usually floats over molten metal, obtained by the reaction of the flux with impurities present in the concentrated ore.

CaO + SiO₂ → CaSiO₃^{gangue flux slag}

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