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  3. 11th Class
  4. Chemistry
  5. Organic Chemistry: Some Basic Principles & Techniques / कार्बनिक रसायन : कुछ मूलभूत सिद्धांत एवं तकन

11th Class Chemistry Organic Chemistry: Some Basic Principles & Techniques / कार्बनिक रसायन : कुछ मूलभूत सिद्धांत एवं तकन

  • question_answer 51)
        Which of the following ores are concentrated by froth floatation? (a) Haematite                    (b) Galena        (c) Copper pyrites            (d) Magnetite

    Answer:

                        (b, c)                                                                         Haematite  and magnetite  are oxide ores while... galena () and copper pyrites  are sulphide ores. As we know sulphide ores are extracted by using froth floatation method. Hence, (b) and (c) are the correct choices.


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