Is it true that under certain conditions, Mg can reduce `Ai_2O_3` and Al can reduce MgO? What are those conditions?

What is reverberation ? How can it be reduced ?

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

Friction can be reduced by making a surface rough. true/ false

Under what conditions are C_4 plants superior to C_3 ?

Under what conditions can the efficiency of a Carnot engine be 100%?

An engine working under isothermal conditions can produce no useful work. Explain.

What is bolting? What conditions can induce bolting naturaly and how can it be induced artificially?

Estimate the minimum potential difference needed to reduce Al_2O_3 at 500^@C . The free energy change for the decomposition reaction: 2/3 Al_2O_3 rarr 4/3Al+O_2 is DeltaG=+960kJ .