Source(s): any book on inorganic chemistry.u can see the book of vogel.QUALITATIVE INORGANIC ANALYSIS-A.I.VOGEL. Oxidation number it is the number assigned to a compound which represent the number of electrons lost or gained. In normal tissue, the epithelial layer forms a protective barrier, and also contains specialized ciliary structures that work to clear foreign bodies, mucus and pathogens from the lungs. Free radicals of oxygen in and around the arc recombine to create ozone [O3]. Select all that apply. In Na₂S₂O₆, the oxidation number of S is +5. Ozonation – a process of infusing water with ozone – can be used in aquaculture to facilitate organic breakdown. However, because cold plasma ozone generators are very expensive, they are found less frequently than the previous two types. Oxygen is -2, the total contribution from all of the oxygens is (3 x -2) = -6. The regime of typical gas pressures is around 2 bars (200 kPa) absolute in oxygen and 3 bars (300 kPa) absolute in air. (Note: Fe3O4 can be considered as a mixture of FeO and Fe2O3) Answer: (d) 6. Select all that apply. [73][74] The cells of the innate system include phagocytes, neutrophils,[74] both thought to contribute to the mechanism of ozone pathology in the lungs, as the functioning of these cell types have been shown to change after exposure to ozone. - The atomic number is equal to the number of protons in the nucleus, - The mass number of a particular element may vary. [165], Ozone application on freshly cut pineapple and banana shows increase in flavonoids and total phenol contents when exposure is up to 20 minutes. a) Assign oxidation numbers for each atom in the equation. [7][8] It is also unstable at high concentrations, decaying into ordinary oxygen. A "cradle-to-cradle" approach to analysis of the life cycle of an item includes the idea that _____. Quantifying the greenhouse gas potency of ozone is difficult because it is not present in uniform concentrations across the globe. For example: Ozone also oxidizes nitric oxide to nitrogen dioxide: This reaction is accompanied by chemiluminescence. At typical industrial conditions, almost 90% of the effective power is dissipated as heat and needs to be removed by a sufficient cooling water flow. Match each compound correctly to its molecular mass. There is a great deal of evidence to show that ground-level ozone can harm lung function and irritate the respiratory system. Such stable molecules have no electrons to lose or gain. The alkaline earth metals (group II) are always assigned an oxidation number of +2. Select all that apply. 1 Answer. 1 0. - The energy consumed to produce the goods. Select all that apply. In fact, there are regions of the world where tropospheric ozone has a radiative forcing up to 150% of carbon dioxide. Which of the following elements will form a cation? Ozone (/ˈoʊzoʊn/), or trioxygen, is an inorganic molecule with the chemical formula O3. Furthermore, the epithelial barrier becomes weakened, allowing pathogens to cross the barrier, proliferate and spread into deeper tissues. [87] From that article: Ozone precursors are a group of pollutants, predominantly those emitted during the combustion of fossil fuels. Deflagration of ozone can be triggered by a spark and can occur in ozone concentrations of 10 wt% or higher. In H₂S, the oxidation number of S is -2. Select all that apply. NON-REACTIVE COMPOUNDS The following compounds do not react with OZONE. In the second half of the 20th Century the amount of ozone in the stratosphere was discovered to be declining, mostly because of increasing concentrations of chlorofluorocarbons (CFC) and similar chlorinated and brominated organic molecules. The concern over the health effects of the decline led to the 1987 Montreal Protocol, the ban on the production of many ozone depleting chemicals and in the first and second decade of the 21st Century the beginning of the recovery of stratospheric ozone concentrations. In an even more specific context, this can also name the non-radical singlet ground state, whereas the diradical state is named trioxidanediyl. Usually ozonolysis is carried out in a solution of dichloromethane, at a temperature of −78 °C. [73] Macrophages, cells that serve the purpose of eliminating pathogens or foreign material through the process of "phagocytosis",[74] have been shown to change the level of inflammatory signals they release in response to ozone, either up-regulating and resulting in an inflammatory response in the lung, or down-regulating and reducing immune protection. 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