Question

define cool and cool tar ? how many types of cool are there ? write down their name​

Answer 1

Answer:

Coal

Coal is a complex mixture of carbon, hydrogen and oxygen compounds. me nitrogen, sulphur and phosphorus compounds are also present in it. It is found in coal mines deep under the surface of earth. Story of formation : It is believed that millions of years ago, the ground below the forests was split open by natural forces such as earthquakes and volcanoes. The forests got buried under the surface of earth. Thus, the plants had no contact with oxygen. Successive layers of sediments sealed the buried plants. Over millions of year, these deposits were subjected to tremendous pressure and heat finally transformed them into coal.

Coal tar (liquid): 

Coal tar is a mixture of different carbon compounds. It thick, black liquid with unpleasant smell. The fractional distillation of coal tar gives many chemical substances which are used in the preparation of dyes, explosives, paints, synthetics fibers, drugs, and pesticides. Some of these chemical substances are benzene, toluene, phenol and aniline. Naphthalene balls used to repel moth and other insects are also obtained from coal tar.

• Coke
• Coal tar
• Coal gas

Answer 2

Explanation:

cool tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal.

cool.

A fairly low temperature ️

There are 4 types of coal.

They are anthracite, Bituminous,subbituminous, Lignite