WAEC Chemistry 2025 Objective — Question 26

Question 26 of 50 from the West African Examinations Council (WAEC) Chemistry 2025 Objective paper, with the correct answer and a full explanation.

The filter in a cigarette reduces the amount of nicotine inhaled by

A. adsorptionCorrect
B. absorption
C. burning
D. evaporation

Explanation

Cigarette filters reduce the amount of harmful substances, including nicotine, by adsorbing (not absorbing) the particles onto their surface. This helps trap some of the toxic chemicals in smoke before they are inhaled. Adsorption involves the adhesion of molecules to the surface of a solid.

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