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Three statements are provided here which define the terms
(a) sludge
(b) sewage and
(c) wastewater.
Pick out the correct definition for each of these terms.
(a) The settled solids that are removed in wastewater treatment with a scraper.
(b) Water from kitchen used for washing dishes.
(c) Wastewater released from homes, industries, hospitals and other public buildings.
(a) Sludge: The settled solids that are removed in wastewater treatment with a scraper.
(b) Wastewater: Water from kitchen used for washing dishes.
(c) Sewage: Wastewater released from homes, industries, hospitals and other public buildings.
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- At many places the wastewater containing human excreta from homes and carried in big underground pipes is dumped into a river as such which pollutes the river water.(a) What is the common name of such wastewater?(b) Name five types of harmful organisms contained in it.(c) Name any five human diseases caused by drinking river water contaminated with such wastewater.
- Describe various steps of cleaning wastewater in a wastewater treatment plant.
- Study the following statements about ozone:(a) It is essential for breathing of living organisms.(b) It is used to disinfect water.(c) It absorbs ultraviolet rays.(d) Its proportion in air is about 3%.Which of these statements are correct?(a), (b) and (c)(b) and (c)(a) and (d)All four
- Prove that \( (a-b)^{2}, a^{2}+b^{2} \) and \( (a+b)^{2} \) are three consecutive terms of an AP.
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- Find the Number of quadruples where the first three terms are in AP and last three terms are in GP using C++

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