2. Give short answers
(a) What is science ?
(b) What is chemistry ?
(c) What is a fuel ?
(d) How is chemistry helpful in improving the
health of human beings?
fe) What is alchemy?
0 What kind of experiments did Alchemists
do 2
(8) What is 'Philosopher's stone'?
Answers
a) Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws.
b)Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
C) A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work.
Answer:
Ans a) Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence.
Ans b)Chemistry is the branch of science that deals with the properties, composition, and structure of elements and compounds, how they can change, and the energy that is released or absorbed when they change.
Ans c) fuel is a substance that is burned to provide nuclear energy, heat or power. Materials like coal, wood, oil, or gas can provide heat when burned. Methanol, Gasoline, Diesel, Propane, Natural gas, Hydrogen are types of fuel.
Ans d)Chemistry is very helpful in improving the health of human beings by providing Antibiotics, Pain killers, Pencilin, Tetracycline etc. It has provided us with Vitamins, Enzymes, Minerals and Anesthesia .
Ans e)Alchemy is the very old study and philosophy of how to change basic substances (such as metals) into other substances. It also studied how substances (and how they are changed into other substances) were related to magic and astrology. People who studied alchemy were called alchemists.
Ans 3) They used all general techniques of chemistry in healing humans. Their contribution proved valuable to the society and in the advancement of civilization. They had contributed to an incredible number of future uses of chemicals, metals, ink, paints, cosmetic, medicines, porcelain, etc.
Ans 8)The philosopher's stone, more properly philosophers' stone or stone of the philosophers is a legendary alchemical substance capable of turning base metals such as mercury into gold or silver.