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1. While doing an activity of burning ofmagnesium ribbon in air, list two precautions thatshould be followed by a student stating the reasonsfor each.(2014-AI6KLXY) |
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Answer» the main precautions should be1) use of pair of tongs to hold a magnesium ribbon and avoid holding it by hand as it may cause burn. 2) wear sunglasses of performing the experiment because of a dazzling heat produced by the magnesium ribbon burning can affect the eyes. 1- As the magnesium ribbon is exposed to air,a thin layer of magnesium oxide is formed due to which incomplete oxidation takes place and burning is slowed down.Thus,the magnesium ribbon is rubbed with sand paper to remove the oxide layer. 2- We should always be very careful while dealing with the flame of bunsen burner as a slight carelessness can lead to serious problems because of the presence of various chemicals in the lab. one more point could be1- Use of sunglasses to protect the eyes from a dazzling flame produced during the buring of magnesium ribbon. |
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