Question

STUDY QUESTIONS
1. Write short notes on development of
chemistry-a historical perspective
2. How does chemistry help in the production
of food?
3. How can you say chemistry plays a vital role
in the production of cosmetics?
4. (a) Define polymer chemistry
(b) Write at least three synthetic fibres and
explain their properties and uses
KEYWO
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The branch of science which deal​

Answer 1

Explanation:

• 1)The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that would eventually form the basis of the various branches of chemistry. ... However, by performing experiments and recording the results, alchemists set the stage for modern chemistry.
• 2)Many of the chemicals found in food occur naturally and include nutrients such as carbohydrates, protein, fat, fibre and a host of other elements and compounds. Chemical substances can play an important role in food production and preservation. ... Other chemicals can be used to fight diseases in farm animals or crops.
• 3)Cosmetics are products designed to cleanse, protect and change the appearance of external parts of our bodies. The key ingredients present in most cosmetics include water, emulsifiers, preservatives, thickeners, moisturisers, colours and fragrances.
• 4)

Polymer chemistry is a sub-discipline of chemistry that focuses on the chemical synthesis, structure, and chemical and physical properties of polymers and macromolecules.

5)nylon, rayon, polyster

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