Question

which of the following statements about secondhand smoke is not true? a. the particles found in secondhand smoke are smaller than the particles found in firsthand smoke. b. secondhand smoke can have higher concentration of dangerous chemicals than firsthand smoke. c. secondhand smoke is inhaled less deeply than firsthand smoke. d. breathing secondhand smoke is at least as dangerous as breathing firsthand smoke.

Explanation:

To determine the false statement about secondhand smoke:

• Option A: Secondhand smoke particles can be smaller as they are more diluted and dispersed, so this can be true.
• Option B: Secondhand smoke can have higher concentrations of some dangerous chemicals due to incomplete combustion and mixing, so this can be true.
• Option C: Secondhand smoke particles, being smaller, can be inhaled more deeply into the lungs, so the claim that it is inhaled less deeply is false.
• Option D: Secondhand smoke is at least as dangerous as firsthand smoke due to chemical composition and particle size, so this is true.

Answer:

C. Secondhand smoke is inhaled less deeply than firsthand smoke.