CBSE Class 7 Science Exploring Substances: Acidic Basic and Neutral (Class 7 NCERT New) Quiz 2

1. What color does turmeric turn in an acidic solution?

A Blue B Yellow C Green D Red

2. What is the nature of common salt?

A Basic B Acidic C Neutral D Alkaline

3. What do neutralization reactions produce?

A A base and water B An acid and a salt C A salt and water D An acid and a base

4. What acid is found in the sting of an ant?

A Acetic acid B Formic acid C Citric acid D Lactic acid

5. Which of the following is a natural acid-base indicator?

A Turmeric B Baking soda C Vinegar D Lime water

6. What is the effect of lemon juice on litmus paper?

A Turns it blue B Turns it green C No effect D Turns it red

7. What color does red litmus paper turn in a basic solution?

A Blue B Red C Green D Yellow

8. Which of the following is an example of a neutral substance?

A Vinegar B Lemon juice C Baking soda D Sugar

9. What is the primary taste of acids?

A Sweet B Sour C Bitter D Salty

10. What is the reaction called when an acid and a base react?

A Synthesis B Neutralization C Combustion D Decomposition