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Oxidation number is the charge assigned to an atom of a molecule or ion according to some arbitry rules .In neutral molecules , the sum of the oxidation numbers of all the atoms present is zero while in a simple or complex ion it is equal to the net charge on ion. In some cases the oxidation number may be even fractional. Athough sometimes a particular elemenet may have same valency and oxidation state but these are based upon different concepts.The number of oxidation states available for a particular elements are normally more than the valencies A brown complex has the formula: [Fe(H_(2))(O)_(5)NO]SO_(4) the oxidation number of iron is:

Packing Fraction||Efficiency||Percentage OF void space||Coordination Number|| Description OF Cube|| Contribution OF Atom present at different location in a Cube||Class Illustrations with Short Tricks

Direction: Given below is a short passage. After the passage, you will find some items based on the passage. First, read a passage and answer the items based on it. The avowed purpose of the exact sciences is to establish complete intellectual control over experience in terms of precise rules which can be formally set out and empirically tested. Could that ideal be fully achieved, all truth and all error could henceforth be ascribed to an exact theory of the universe, while we who accept this theory would be relieved of any occasion for exercising our personal j udgement. We should only have to fo llow the rules faithfully. Classical mechanics approaches this ideal so closely that it is often thought to have achieved it. But this leaves out of account the element of personal judgement involved in applying. the formulae of mechanics to the facts of experience. An exact theory of the universe is