Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does COD stand for?
💡 Hint: Think about the oxygen consumption in water.
Question 2
Easy
Name one oxidizing agent used to measure COD.
💡 Hint: It's a strong acid often used in chemistry labs.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the primary purpose of measuring COD?
- To measure dissolved oxygen
- To assess organic load
- To determine pH levels
💡 Hint: Remember what COD stands for.
Question 2
True or False: Higher BOD values indicate a higher presence of non-biodegradable materials.
- True
- False
💡 Hint: Think about the definitions of BOD and COD.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Suppose a researcher finds a COD level of 1200 mg/L in a river sample. What steps should be recommended based on this analysis?
💡 Hint: Consider what high COD levels indicate about pollution.
Question 2
Design an experiment to determine the relationship between industrial discharge and changes in COD levels downstream. What factors would you need to consider?
💡 Hint: Think about how to effectively measure changes in water quality.
Challenge and get performance evaluation