Understanding Hair Chemistry

What compound is responsible for the smell often associated with perms?

• Ammonia

• Nitrogen

• Sulfur

• Chlorine

What type of bond in hair is altered during a perm to change its shape?

• Peptide bond

• Ionic bond

• Hydrogen bond

• Disulfide bond

Why are sulfur bonds in hair considered strong?

• They last a long time.

• They are weak and temporary.

• They do not affect hair structure.

• They are easily broken by water.

How do hydrogen bonds in hair react to humidity?

• They form and break easily, affecting hair curliness.

• They do not react to humidity.

• They break down completely.

• They become stronger and permanent.

What happens to hair when the air around it dries out after being exposed to humidity?

• It changes color.

• It remains frizzy permanently.

• It returns to its normal state.

• It becomes straighter.