2. Sample Papers
  3. 7th Class
  4. Science

7th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    Which of the following is a base?

    A) Sodium hydroxide          

    B) Potassium hydroxide

    C) Hydrochloric acid

    D) Both and (b)

    E) None of these

    Correct Answer: D

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