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    Biology
    Grade-7
    Easy

    Question

    Match the following. (understanding)
    1.Organic waste in water                      a. Nitrogen and phosphorus
    2. Inorganic waste in water                   b. Pesticides and herbicides
    3. Nutrients                                           c. Nitrates and phosphates

    1. 1-b, 2- a, 3-c
    2. 1-b, 2-c, 3-a
    3. 1-c, 2-b, 3-a
    4. 1-a, 2-b, 3-c

    hintHint:

    Organic and inorganic refers to compounds which contain carbon and those which do not contain them, respectively.

    The correct answer is: 1-b, 2-c, 3-a

      • The correct option is 1-b, 2-c, 3-a
      • The organic compounds are those which contain C, H, O and their derivatives. These are highly volatile in nature. These are insoluble in water. Of the options, pesticides and herbicides are organic in nature which are derived from natural sources like plants.
      • The inorganic compounds are those which do not contain C, H, O and their derivatives. These are not volatile. These are soluble in water. Of the options, nitrates and phosphates are inorganic in nature.
      • Nitrogen and phosphates are nutrients which are required for the growth of plants and algae. These are provided in the form of fertilizers to the soil to promote the growth of crops.

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