Class 8 Science Chapter 16 | Pollution of Air and Water NCERT Solutions 1. What are the different ways in which water gets contaminated ? Answer: Water gets contaminated by : a) Sewage waste: Waste material from toilet, kitchens, laundry which are discharged in water without proper treatment causes its contamination. b) Industrial dispose: Harmful and poisonous … [Read more...] about Chapter 18 Pollution of Air and Water
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Chapter 16 Light
NCERT Solutions for Chapter 16 Light Class 8 1. Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room. Explain. Answer: An object becomes visible when light reaches our eyes after being reflected from the object.If we are in dark room, then it is not possible for us to see the objects because no light is reflected from the … [Read more...] about Chapter 16 Light
Chapter 14 Chemical Effects of Electric Current
Class 8 Science Chapter 12 | Chemical Effects of Electric Current NCERT Solutions 1. Fill in the blanks. (a) Most liquids that conduct electricity are solutions of , _______ and ________. (b) The passage of an electric current through a solution causes __________ effects. (c) If you pass current through copper sulphate solution, copper gets deposited on the plate connected … [Read more...] about Chapter 14 Chemical Effects of Electric Current
Chapter 13 Sound
Class 8 Science Chapter 13 | Friction NCERT Solutions 1. Choose the correct answer. Sound can travel through (a) gases only (b) solids only (c) liquids only (d) solids, liquids and gases. Answer: (d) solids, liquids and gases 2. Voice of which of the following is likely to have minimum frequency? (a) Baby girl (b) Baby boy (c) A man (d) A woman Answer: (c) A … [Read more...] about Chapter 13 Sound
Chapter 12 Friction
Class 8 Science Chapter 12 | Friction NCERT Solutions 1. Fill in the blanks. (a) Friction opposes the _____________ between the surfaces in contact with each other. (b) Friction depends on the _____________ of surfaces. (c) Friction produces __________. (d) Sprinkling of powder on the carrom board ________ friction. (e) Sliding friction is ___________ than the static … [Read more...] about Chapter 12 Friction