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The Fume Cupboard : If a reaction uses or produces harmful gases, dusts or vapours, it poses a risk of inhalation. Such reactions should be carried out not on an open bench but in a fume cupboard. You would have read briefly about the designing part of fume cupboard in Unit 1 of this coarse. You may know that many laboratory operations need to be carried out in fume cupboard, e.g. working I with nitrating mixtures, benzoyl chloride etc. A demonstration activity will enable you to understand the importance and use of a fume cupboard. A typical laboratory fume cupboard is shown in Figure.
'Figure: A typical laboratory fume cupboard.
A fume cupboard is constructed to allow the normal laboratory services of gas, water and electricity to be utilised. In addition, an air extraction system i.e. an exhaust fan, with a minimum statutory air flow, ensures that dangerous vapours are vented to the atmosphere.
Access to the fume cupboard is via sliding panels of safety glass. It is important to note the maximum height to which these panels can be safely raised before the air flow into the fume cupboard drops below the required rate.
Due Date: May 15, 2016 23:59:59 Max Points: 150 Details: Prepare a critical analysis of a qualitative study focusing on the problem statement, study purpose, research questi
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Do You Know Where i Might Be Able To Find An Online Science book for Chapter 16 In 8th Grade
what comes first? egg or chicken?
Why is there more exchangeable calcium than potassium on clay/humus colloid? Calcium is usually abundant except in acid soils which occur in humid area due to excessive leaching.
1. How much variation is there in the routine analysis of fibre content of soya cotton cakes? The data are presented by the lab that did the test and the technician within the lab
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