Biology
Define the terms:
(a) Waste
(b) Fly ash
(c) E-wastes
(d) Composting
(e) Mine tailing
Answer
(a) Waste is any substance which is discarded after primary use, or is worthless, defective and of no use.
(b) Fly ash is gaseous waste of cement industry which contains fine solid particles of non-combustible ash.
(c) e-Wastes are electronic wastes that consist of discarded appliances using electricity like computers, TVs, etc.
(d) Composting means putting the waste organic matter to decay so that it can be used for fertilizing the agricultural land.
(e) Mine tailing are the left-over material after the processing of the mined products like copper, silver, gold, etc.
Related Questions
Correct the following statements by changing the first/last word only.
(a) Some of the electronic wastes may contain valuable metals such as potassium.
(b) Sludge is the gaseous waste of cement industry.
(c) Drains are used to remove gaseous and particulate air pollutants.
(d) Industrial liquid waste is termed as sewage.
(e) Rags are the plant residue left after extracting the sugarcane juice.
Match the items in Column I with as many items as possible in Column II.
Column I Column II Cow dung Sugarcane Bagasse Manure Okhla khad Food wastes Lead and cadmium e-wastes Give reasons for the following:
(a) Broken glass utensils are a kind of non-degradable waste.
(b) Landfills are coming up fast near large cities.
(c) Why is municipal sewage first separated into degradable and non-degradable wastes?
Define electronic waste and list at least six items which come under this category.