Accuracy of Measurement The accuracy of any measurements depends upon the (a) accuracy of the measuring device used (b) the skill of its operator. If the average value of different measurements is close to the correct value ,the measurement is said to be accurate. If the values of different measurements are close to each other and hence close to the average value, … [Read more...] about Significant Figures
Some Basic Concepts of Chemistry
Physical Quantities
Physical Properties Physical Properties are those which can be measured or observed without changing the identity or composition of the substance. For example : Mass, volume, melting point, boiling point. Chemical properties Chemical properties are those in which a chemical change in the substance occurs. The measurement of any physical quantity consists of two … [Read more...] about Physical Quantities
Classification of Matter
Matter Matter is defined as anything that occupies space and possesses mass. Classification of Matter (1) Physical classification (a) Solid (b) Liquid (c) Gases Solid Liquid Gases (1) They have fixed shape and volume They do not have fixed shape but have fixed volume They do not have fixed shape and volume (2) They cannot be compressed They … [Read more...] about Classification of Matter
Importance of Chemistry
Importance of Chemistry Some Basic Concepts of Chemistry Class 11 Chemistry Chemistry is defined as that branch of science deals with the study of composition, structure and properties of matter and the changes which the matter undergoes under different conditions and laws which govern these changes. Importance of Chemistry (1) Supply of Food (1) It has provided … [Read more...] about Importance of Chemistry