1. MCQ: Which of the following substances is classified as an acid? a) Lemon juice b) Milk c) Water d) Sugar

Correct answer: a) Lemon juice

1. True or False: Acids have a pH level greater than 7. Correct answer: False

2. Fill in the blank: A substance with a pH level below 7 is classified as a(n) ____. Correct answer: acid

3. Short answer: Give an example of a commonly used substance that is classified as a base. Correct answer: Soap

4. Multiple response: Which of the following substances are classified as acids? (Select all that apply) a) Vinegar b) Orange juice c) Baking soda d) Coffee

Correct answers: a) Vinegar and b) Orange juice

1. Picture or image-based question: Look at the image below. Is the substance shown an acid or a base?

[Image of a lemon]

Correct answer: Acid

1. MCQ: Which of the following substances is classified as a base? a) Vinegar b) Lemon juice c) Ammonia d) Tomato juice

Correct answer: c) Ammonia

1. True or False: Bases have a slippery feel when touched. Correct answer: True