2. Questions Bank
  3. 7th Class
  4. General Knowledge
  5. Miscellaneous / विविध

7th Class General Knowledge Miscellaneous / विविध Question Bank Science and Technology

  • question_answer
    Which of the following chemicals is not used in photographic processing?

    A)  Silver halide

    B)  Ammonium thiosulphate

    C)  Copper nitrate

    D)  Both [a] and [b]

    Correct Answer: C

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