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Micro-Organisms: Friends and Foe Science - Micro-Organisms: Friends and Foe

Rajasthan Board (RBSE) - STD 8 - Science (Rajasthan - English Medium). 108 questions in this chapter.

Question types

Micro-Organisms: Friends and Foe question types

108 questions across 6 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

108
Questions
6
Question groups
5
Question types
Sample Questions

Micro-Organisms: Friends and Foe questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 2M.C.Q. [I MARKS]1 Mark
Which of the following cannot be used as a food preservative?
  • A
    Sodium metabisulphite.
  • ✓
    Sodium hydroxide.
  • C
    Sodium benzoate.
  • D
    Citric acid.

Answer: B.

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Q 3M.C.Q. [I MARKS]1 Mark
Which of the following is not a use of micro-organisms?
  • A
    Preparation of medicines (or drugs).
  • B
    Preparation of food by photosynthesis.
  • C
    Recycling of materials in nature.
  • ✓
    Increasing the fertility of soil.

Answer: D.

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