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 is one indicator of a chemical reaction?
💡 Hint: Think about what happens when an antacid is dropped in water.
Question 2
Easy
What do we call a solid that forms from a liquid solution during a chemical reaction?
💡 Hint: This is often cloudy at first before settling.
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 a sign of a chemical reaction?
- Formation of gas
- Change of state
- Physical mix
💡 Hint: Consider something you might see in a fizzy drink.
Question 2
True or False: A precipitate is always visible immediately when two solutions are mixed.
- True
- False
💡 Hint: Think about your observations in the lab or kitchen.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You notice a metal object is getting warmer to touch while it reacts with an acid. Explain the type of chemical reaction that might be taking place.
💡 Hint: Think about reactions involving acids and metals.
Question 2
During a lab experiment, you mix two colorless solutions, and a yellow solid develops after several minutes. How would you report your observation regarding the chemical changes?
💡 Hint: Consider the characteristics of precipitate formation.
Challenge and get performance evaluation