Question

15 ____________________ refers to either the loss of oxygen or the addition of hydrogen.
16 in a redox reaction, the oxidizing agent is always ____________________ and the
reducing agent is always ____________________.
17 when using a permanent wave solution, the waving solution is ____________________.
18 the loss of oxygen in the hydrogen peroxide during the process of mixing hair coloring is an
example of ____________________.
19 a(n) ____________________ reaction is a chemical reaction that requires the absorption
of energy or heat from an external source for the reaction to actually occur.

Explanation:

Question 15

Reduction in chemistry is defined as the process involving either the loss of oxygen or the addition of hydrogen (or gain of electrons). So the term here is "Reduction".

In a redox (reduction - oxidation) reaction, the oxidizing agent is the substance that gets reduced (gains electrons), and the reducing agent is the substance that gets oxidized (loses electrons).

Permanent wave solutions (waving solutions) are reducing agents. They help in breaking the disulfide bonds in hair (a reduction process) to allow the hair to be reshaped.

Answer:

Reduction

Question 16