InterviewSolution
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InterviewSolution
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From amongst the following, choose the metals and non-metals and state one of the properties on the basis of which you have made you choice. (i). Graphite (ii). Sodium (iii). Phosphorus (iv). Helium. |
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Answer» Out of graphite, sodium, phosphorus and helium, only sodium is a metal. Allother are non-metals. This choice has been made on the basis of the nature of their oxides. This is because metals form basis oxides whereas non-metals form acidic oxides or neutral oxides. (i) Graphite is actually carbon element. graphite or carbon usually forms an acidic oxide, carbon dioxide, so, graphite is a non-metal. (ii). Sodium forms a basic oxide, sodium oxide. So, sodium is a metal (iiii). Phosphorus forms an acidic oxide, phosphorus pentoxide,. So, phosphorus is a non-metal (iv). Helium is a gas, so it is a non-metal, being an inert gas, helium does not form an oxide. |
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