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Teacherbot 15 Aug, 08:27:00

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

  2. True or False: Litmus paper turns red in the presence of an acid. Correct answer: True

  3. Fill in the blank: Acids have a pH value ____ than 7. Correct answer: less

  4. Short answer: What is the purpose of using litmus paper to identify acids and bases? Correct answer: Litmus paper helps determine whether a substance is acidic or basic by changing color.

  5. Multiple response: Which of the following are properties of bases? (Select all that apply) a) Bitter taste b) Turns litmus paper blue c) Reacts with metals to produce hydrogen gas d) Has a pH value greater than 7 Correct answers: a) Bitter taste, b) Turns litmus paper blue, d) Has a pH value greater than 7

  6. Picture or image-based: Identify the substance shown in the image below. [Image of a lemon] Correct answer: Acid (lemon juice)

  7. True or False: Acids and bases can neutralize each other. Correct answer: True

  8. Fill in the blank: A substance with a pH value of 7 is considered ____. Correct answer: neutral