Selina ICSE Solutions for Class 9 Biology Chapter 19 - Waste Generation and Management Exercise 1 A. Multiple Choice Type: 1.The most convenient reusable wastes are (a) Old newspapers (b) Broken glass (c) Flyash (d) Medical instruments 2.The most rapidly increasing and much harmful waste today is (a) plastics (b) pesticides (c) municipal sewage (d) electronic waste Solution A. (a) Old newspapers (a) plastics B. Very Short Answer Type 1.Name the following : (a) The solid precipitated material produced during secondary treatment of the effluent carried out in the effluent treatment plants. (b) The two types of devices commonly used for removing the particulate air pollutants. Solution B.1. (a) Sludge (b) Scrubber, Plate type electrostatic precipitator 2.Mention whether the following statements are true (T) or False (F). (a) Some of the electronic wastes may contain valuable metals such as copper. (T/F) (...
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