1. When solid barium oxide and aluminum are heated to
a high temperature, the products are liquid barium and solid aluminum oxide.

Explanation:

The reaction between iron(III) oxide and aluminum produces aluminum oxide and iron. This reaction is known as a thermite reaction and is highly exothermic. The large amount of heat released is enough to melt oxygen and aluminum. The heat produced in the reaction melts the iron produced. In this reaction, iron(III) oxide loses oxygen to form iron - so iron(III) oxide is reduced. Carbon gains oxygen to form carbon dioxide - so carbon is oxidised.

a polar bond is formed when electrons are shared unevenly between atoms

the correct answer would be b) volume versus temperature, because they are also directly proportional.