Sunday, 25 January 2026

 

Class 8 Science – Chapter 2
Microorganisms: Friend and Foe
Multiple Choice Questions (MCQs)


  1. Which of the following is a microorganism?
    a) Ant    b) Frog    c) Bacteria    d) Earthworm

  2. Which microorganism is used in making curd?
    a) Virus    b) Algae    c) Bacteria    d) Protozoa

  3. Which of the following diseases is caused by bacteria?
    a) Malaria    b) Dengue    c) Tuberculosis    d) Chickenpox

  4. The microorganism that causes malaria is:
    a) Bacteria    b) Virus    c) Protozoa    d) Algae

  5. Which microorganism helps in nitrogen fixation?
    a) Virus    b) Bacteria    c) Fungi    d) Protozoa

  6. Which of the following is NOT a method of food preservation?
    a) Salting    b) Drying    c) Boiling daily    d) Freezing

  7. Which chemical is used as a food preservative?
    a) Sugar    b) Salt    c) Sodium benzoate    d) Water

  8. Which disease is spread by mosquitoes?
    a) Cholera    b) Malaria    c) Typhoid    d) Tuberculosis

  9. Pasteurization is mainly used for:
    a) Fruits    b) Vegetables    c) Milk    d) Meat

  10. Which microorganism is used in baking bread?
    a) Bacteria    b) Virus    c) Algae    d) Yeast

📌 Next: Chapter 2 – Worksheet & Answers

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