UHA Chemistry Notes 9th Class
UHA Chemistry Notes 9th Class Chapter-1 Important short Question: 1. What is chemistry ? Ans: The branch of science which deals with the composition, structure, properties and reactions of matter is called chemistry. 2. What role is played by chemistry in our daily life ? Ans: The development of science and technology has provide us a lot of facilities in daily life . Imagine the role and importance of petrochemical products , medicines and drugs , soap , detergent , soap , plastic , paint , pigments , insecticides , pesticides , which all are fruit of the efforts of chemists. 3. What is physical chemistry also give two example about physical chemistry ? Ans: Physical Chemistry is defined as the branch of chemistry that deals with the relationship between the composition and properties of matter along with the changes in them. For example th...
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