Class 8 | Science | Ch 5 | Coal and Petroleum | NCERT Solutions Question 1 What are the advantages of using CNG and LPG as fuels? Answer The advantages of using CNG and LPG as fuel are: It is a god fuel because it burns easily and produces a lot of heat. It burns with a smokeless flame and cause no air pollution. It does not produce any poisonous gases on … [Read more...] about Chapter 5 Coal and Petroleum
Class 8
Chapter 18 Pollution of Air and Water
Class 8 | Science | Ch 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
Chapter 15 Some Natural Phenomena
Class 8 | Science | Ch 15 |Some Natural Phenomena| NCERT Solutions Select the correct option in Questions 1 and 2. 1. Which of the following cannot be charged easily by friction? (a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth. Answer: (b) A copper rod 2. When a glass rod is rubbed with a piece of silk cloth the rod (a) and the … [Read more...] about Chapter 15 Some Natural Phenomena
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 | Ch 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 | Ch 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 | Ch 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
Chapter 11 Force and Pressure
Class 8 | Science | Ch 9 |Force and Pressure| NCERT Solutions 1. Give two examples each of situations in which you push or pull to change the state of motion of objects. Answer: 1) If we kick a stationary football kept on the ground, then the football starts moving. The force of our foot makes the stationary football to move. 2) Take a rubber ball and place it on … [Read more...] about Chapter 11 Force and Pressure
Chapter 9 Reproduction in Animals
Class 8 | Science | Ch 9 |Reproduction in Animals| NCERT Solutions 1. Explain the importance of reproduction in organisms. The production of new organism from the existing organism of the same species is known as reproduction.Reproduction is the creation of new living things.It is essential for the survival of species on this earth. So, living organism produce more … [Read more...] about Chapter 9 Reproduction in Animals
Chapter 8 Cell Structure and Functions
Class 8 | Science | Ch 8 | Cell Structure and Functions | NCERT Solutions 1. Indicate whether the following statements are True (T) or False (F). (a) Unicellular organisms have one-celled body. (T/F) (b) Muscle cells are branched. (T/F) (c) The basic living unit of an organism is an organ. (T/F) (d) Amoeba has irregular shape. (T/F) Answer: (a) Unicellular organisms … [Read more...] about Chapter 8 Cell Structure and Functions