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  3. 9th Class
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9th Class Science Sample Paper Sample Paper - 4 Term - 1

  • question_answer
      Substance 'X' was added to a test-tube containing water and grounded arhar dal to test the presence of metanil yellow. The colour of solution changed to pink. Identify 'X'.

    Answer:

      'X' is hydrochloric acid (HCl).                                                                                                                                                        (1)


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