Chemical fertilizer spowr pt
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The document discusses various chemical pesticides like endosulfan, DDT, malathion, and furidan that are harmful to animals, plants, humans, and microorganisms. It notes that these pesticides pollute water, soil, and air. It covers different types of pesticides and their applications and negative effects, such as affecting the human brain. The document recommends reducing pesticide use, using biopesticides instead of chemical pesticides, and banning dangerous pesticides to be more environmentally friendly.
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potential of aquatic macrophytes for pollutant removal or even
as bio-indicators for heavy metals in aquatic ecosystems. Water
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metals and pathogens. This paper mainly focuses on the
treatment of waste water using the plant ‘water hyacinth’ and
has given emphasis to the removal of heavy metals by the
plant. Water hyacinth’ could grow in sewage; they absorb and
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Athira p s
The document discusses a story from Kamala Das' work "The Tattered Blanket". It describes how Gopi unexpectedly arrived at his family home in his jeep. His mother, who was laying in an armchair, struggled to get up upon his arrival. Kamalam, the eldest daughter, reluctantly went to the gate and had trouble recognizing Gopi. The mother did not recognize her son, possibly due to amnesia from old age. The document then provides exercises for students, including defining difficult words from the story and constructing a conversation between Kamalam and Gopi.
Ionic bond
An ionic bond is formed between a metal and a nonmetal when one or more electrons from the metal atom transfers to the nonmetal atom, forming positively charged metal ions and negatively charged nonmetal ions that are attracted to each other by electrostatic forces. This transfer of electrons is called electrovalency and results in the outer shell of the metal atom being completely filled while the outer shell of the nonmetal atom is only partially filled. The ions formed are held together in a crystal lattice structure.
Ionic bond
An ionic bond is formed between a metal and a nonmetal when one or more electrons from the metal atom transfers to the nonmetal atom, forming positively charged metal ions and negatively charged nonmetal ions that are attracted to each other through electrostatic forces. This transfer of electrons is known as electrovalency and results in the outer shell of both atoms being filled and stable octets being formed. The ions are held together in a crystal lattice structure by the strong electrostatic forces of attraction between the positively and negatively charged ions.
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