Waec Model Questions Vol1 2017 Chemistry Question 41
Practice objective / multiple choice question 41 from the 2017 Waec Model Questions Vol1 Chemistry examination.
A factory discharges wastewater at a rate of 1 500 L min⁻¹ containing 80 mg L⁻¹ phenol into a river that flows at 50 000 L min⁻¹ with an initial phenol concentration of 5 mg L⁻¹. After complete mixing, the water travels 10 km downstream where phenol undergoes first‑order degradation with a rate constant of 0.02 min⁻¹. If the water velocity is 2 km min⁻¹, what is the phenol concentration (in mg L⁻¹) at the downstream point? Give your answer to two decimal places.
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About This Question
This is Waec Model Questions Vol1 2017 Chemistry Question 41. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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