Question

What do the chemical reactions that occur during burning and rusting have in common? A. They are both reactions of a substance with water. B. They are both reactions of a substance with oxygen. C. They are both reactions that happen very quickly. D. They are both reactions that produce oxygen.

Answer 1

Answer: B. They are both reactions of a substance with oxygen

Explanation: Burning is oxidation of a substance in the presence of oxygen. Example: Burning of natural gas which mainly consists of methane is an example of a chemical reaction in methane is burnt in the presence of oxygen and is transformed into carbon dioxide, water vapor and ash.

$CH_4+2O_2\rightarrow CO_2+2H_2O$

Rusting is the oxidation of iron in the presence of air and water to lead to formation of hydrated ferric oxide called as rust.

$Fe+O_2+H_2O\rightarrow Fe_2O_3.xH_2O$

Answer 2

B. They are both reactions of a substance with oxygen