Neco 2025 Chemistry Question 10
Practice objective / multiple choice question 10 from the 2025 Neco Chemistry examination.
A lake contains 5000\,L of water with a nitrate concentration of 10\,mg\,L\( ^{-1} \). A treatment plant adds 200\,L of a solution that contains 0.5\,g of nitrate per litre. After thorough mixing, nitrate is removed by a first‑order process with rate constant \( k = 0.02 \ \text{day}^{-1} \). Determine the nitrate concentration (in mg\,L\( ^{-1} \)) remaining in the lake after 5 days. Assume the lake volume remains 5000\,L.
Answer Options
About This Question
This is Neco 2025 Chemistry Question 10. It is one of the objective questions from the 2025 Neco Chemistry examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.