G. Answer the following questions.
1. What is chemistry?
2. What does chemistry deal with?
3. Write a short note on Development of Chemistry.
4. Write any two important fertilizers used in India.
5. What are pesticides? Give two examples of pesticides.
6. What is a synthetic fibre? Name any two synthetic fibres.
7. Give three examples of fungicides.
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Answers
Answer:
- the scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other
2.Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.
3.: The development of the modern scientific method was slow and arduous, but an early scientific method for chemistry began emerging among early Muslim chemists, beginning with the 9th-century chemist Jābir ibn Hayyān (known as "Geber" in Europe), who is sometimes regarded as "the father of chemistry
4.The fertilizer industry in India is in the core sector and second to steel in terms of investment. Prior to 1960/61, India produced only straight nitrogenous fertilizers [ammonium sulphate (AS), urea, calcium ammonium nitrate (CAN), ammonium chloride and single superphosphate (SSP)].
5.the pasticide is the substance which kill the unwanted plant and animals.Examples of pesticides are fungicides, herbicides, and insecticides. Examples of specific synthetic chemical pesticides are glyphosate, Acephate, Deet, Propoxur, Metaldehyde, Boric Acid, Diazinon, Dursban, DDT, Malathion, etc.
6.various man-made textile fibers including usually those made from natural materials (such as rayon and acetate from cellulose or regenerated protein fibers from zein or casein) as well as fully synthetic fibers (such as nylon or acrylic fibers) — compare polymer.
7.Sulfur, sulfur-containing compounds, organic salts of iron, and heavy metals are all used as fungicides. Other fungicide types include carba-mates or thiocarbamates such as benomyl and ziram, thiozoles such as etridiazole, triazines such as anilazine, and substituted organics such as chlorothalonil.
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Answer:
- the scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other.
- Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.
- The development of the modern scientific method was slow and arduous, but an early scientific method for chemistry began emerging among early Muslim chemists, beginning with the 9th-century chemist Jābir ibn Hayyān (known as "Geber" in Europe), who is sometimes regarded as "the father of chemistry".
- The fertilizer industry in India is in the core sector and second to steel in terms of investment. Prior to 1960/61, India produced only straight nitrogenous fertilizers [ammonium sulphate (AS), urea, calcium ammonium nitrate (CAN), ammonium chloride and single superphosphate (SSP)].
- a chemical substance that is used for killing animals, especially insects, that eat food crops. Examples of pesticides are fungicides, herbicides, and insecticides.
- Synthetic fibre is man-made fibres, most of them are prepared from raw material.Rayon.Acrylic.Nylon. Polyester.
- Thiocarbamates ,Ethylene Bis Dithiocarbamates (EBDC's),Thiophthalimides
hope this helps you....