Notes On Gaseous State This page provides you all details about the gaseous state of BSc standard. Concerned problems will be solved at the end of each concept. Continue till the end to find the easiest explanation of every concept you need in this regard . Postulates of Kinetic Theory of Gases: 1. All gas consist of a very large number of minute particles, called molecules. 2. The gas molecules are extremely small in size and are separated by large distance. The actual volume of the gas molecules is thus negligible as compared to the total volume occupied by the gas. 3. The pressure exerted by the gas is due to the bombardment of the molecules on the walls of the vessel. 4. The gas molecules collide with one another and also with the walls of the vessels. These collisions are perfectly elastic and there is no loss of energy during these collisions. 5. The distance between the gas molecules are very large. Thus, there is no effective force of attraction or r
How to calculate the change in oxidation number in a redox reaction? Following are the steps to follow when you calculate change in oxidation number in a redox reaction. Once you practice two to three times than that becomes super easy to calculate the change in O.N. Take an example of the following reaction (First and easy method). H 2 S + Br 2 -----> HBr + S Step 1: Write the equation in the ionic form and do not balance it. H + +S 2- + Br 2 -----> H + +Br - +S Step 2: Ignore common ions on both side S 2- + Br 2 -----> Br - + S Step 3: Write the O.N of elements at the top now S 2- + Br 2 0 -----> Br - + S 0 Step 4: Find the O.N change of any element by: For example, O.N change of S = [0 – (--2)] X 1 = +2 O.N change of Br = [–1 – 0] X 2 = –2