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 color does litmus paper turn in an acidic solution?
💡 Hint: Think of how a warning light can indicate danger.
Question 2
Easy
How does phenolphthalein change color in a basic solution?
💡 Hint: Consider the happy color of many flowers.
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 does litmus paper turn in a basic solution?
- Red
- Blue
- Green
💡 Hint: Think about the primary color associated with 'base'.
Question 2
True or False: Phenolphthalein turns pink in acidic solutions.
- True
- False
💡 Hint: One color represents acid, the other base.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Explain the pH range in which phenolphthalein is effective, and why it would not work well for very strong acids.
💡 Hint: Consider its color change range and the nature of strong acids.
Question 2
Design a comparative study using litmus paper and phenolphthalein to determine pH levels of three household solutions. Present your findings.
💡 Hint: Think of commonly used household items that differ in acidity.
Challenge and get performance evaluation