{"id":16126,"date":"2023-06-30T01:11:17","date_gmt":"2023-06-29T19:41:17","guid":{"rendered":"https:\/\/apboardsolutions.in\/?p=16126"},"modified":"2023-07-01T17:45:05","modified_gmt":"2023-07-01T12:15:05","slug":"ap-board-8th-class-physical-science-notes-chapter-7","status":"publish","type":"post","link":"https:\/\/apboardsolutions.in\/ap-board-8th-class-physical-science-notes-chapter-7\/","title":{"rendered":"AP Board 8th Class Physical Science Notes Chapter 7 Coal and Petroleum"},"content":{"rendered":"

Students can go through AP State Board 8th Class Physical Science Notes<\/a> Chapter 7 Coal and Petroleum to understand and remember the concept easily.<\/p>\n

AP State Board Syllabus 8th Class Physical Science Notes Chapter 7 Coal and Petroleum<\/h2>\n

\u2192 Natural resources can be classified into exhaustible and inexhaustible resources.<\/p>\n

\u2192 Fossil fuels are formed from the dead remains of living organisms under the earth over millions of years.<\/p>\n

\u2192 Coal, petroleum, and natural gas are fossil fuels.<\/p>\n

\u2192 Coke, coal tar, and coal gas are the products of coal.<\/p>\n

\u2192 Petroleum is formed from the remains of tiny organisms called plankton.<\/p>\n

\u2192 Petroleum gas, petrol, diesel, kerosene, paraffin wax, lubricating oil are obtained by refining petroleum.<\/p>\n

\u2192 Natural gas is found sometimes along with petroleum and sometimes without petroleum.<\/p>\n

\u2192 The useful substances which are obtained from petroleum and natural gas are called petrochemicals.<\/p>\n

\u2192 Excess use of fossil fuels causes air pollution, greenhouse effect, global warming, and many health problems.<\/p>\n

\u2192 Fossil fuels resources are very limited. We should think of alternatives.<\/p>\n

\u2192 Advanced science and technology have changed our lives.<\/p>\n

\u2192 Natural resources: The resources obtained from nature are called natural resources.<\/p>\n

\"AP<\/p>\n

\u2192 Exhaustible Resources: The resources which are limited in nature and can be exhausted by human activities are called exhaustible resources.<\/p>\n

\u2192 Inexhaustible resources: The resources which are unlimited \u00a1n nature and not likely to be exhausted by human activities are called inexhaustible resources.<\/p>\n

\u2192 Petroleum: Petroleum \u00a1s o complex mixture mainly consists of hydrocarbons.<\/p>\n

\u2192 Fractional distillation: It is one type of distillation in which fractionating columns are used to separate a mixture of compounds.<\/p>\n

\u2192 Natural gas: Natural gas \u00a1s a very important fossil fuel.<\/p>\n

\u2192 CNG: Natural gas is stored under high pressure is called compressed natural gas.<\/p>\n

\u2192 Coke: It is a tough, porous, black in color and purest form of carbon substance.<\/p>\n

\u2192 Coal gas: The gas obtained during the processing of coal to get a coke.<\/p>\n

\u2192 Coal tar: It is a black colored thick liquid with an unpleasant smell<\/p>\n

\u2192 Carbonization: Theslowprocessofconvertion of dead vegetation into coal is called carbonization.<\/p>\n

\u2192 Plankton: The tiny organisms found in the bottom of seas and oceans.<\/p>\n

\"AP<\/p>\n

\u2192 Fossil fuels: The fuels formed from the dead remains of living organisms are called fossil fuels.<\/p>\n

\u2192 Petrochemicals: The substances obtained from petroleum and natural gas are coiled petrochemicals.<\/p>\n

\u2192 Petroleum refinery: The process of separating the various constituents fractions of petroleum is petroleum refinery.
\n\"AP
\n\u2192 Michael Faraday (1791 – 1867):<\/p>\n