Suggest a condition unders which magnesium could reduce alumina.

(a) Suggest a condition under which magnesium could reduce alumina. (b) Although thermodynamically feasible, in practice magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ? ( c) What is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction ? (d) At a site, low grade copper ores oare available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why ?

A part of Ellingham diagram is shown below : (i) Will Cr_2 O_3 be reduced by Al or not ? (ii) Suggest a condition under which magnesium could reduced aluminium.

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

The conditions under which transpiration would be most rapid

Explain the conditions under which a mirage is seen.

The conditions under which transpiration would be most rapid are

State the conditions under which a force does no work.?

The under certain conditions magnesium can be reduce SiO_(2) and silicon can reduce MgO. What are those conditions?