Oil and fat containing food items are flushed with nitrogen. Why?

Explain the "Reduction" in terms of gain or loss of oxygen with two examples.

Explain the term 'Corrosion' with one example.

Which of the statements about the reaction below are incorrect?
$2 PbO_{(s)} + C_{(s)} \longrightarrow 2 Pb_{(s)} + CO_{2(g)}$
$(a)$ Lead is getting reduced.
$(b)$ Carbon dioxide is getting oxidised.
$(c)$ Carbon is getting oxidised.
$(d)$ Lead oxide is getting reduced.

What does one mean by exothermic and endothermic reactions? Give examples.

Why is respiration considered an exothermic reaction? Explain.