Fill in the blanks.
(a) Coal is one of the………….used to cook food.
(b) When heated in air, coal burns and produces mainly ……….gas.
(c) Coal tar is a black, thick ……….with an …………. smell.
(d) Petroleum, ………….. and ……….. are fossil fuels.
(e) Forests and coal are ……….. natural resources.
(a) Coal is one of the fuels used to cook food.
(b) When heated in air, coal burns and produces mainly carbon dioxide gas.
(c) Coal tar is a black, thick liquid with an unpleasant smell.
(d) Petroleum, coal and natural gas are fossil fuels.
(e) Forests and coal are exhaustible natural resources.
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- The _______ of coal produces coke, coal tar and coal gas
- Fill in the blanks.(a) The slow process of conversion of dead vegetation into coal is called __________.(b) Coal and petroleum are formed from the dead remains of organisms and are known as __________.(c) The black thick liquid with __________ smell is known as coal tar.(d) During the processing of coal to get coke, coal tar and __________ are also obtained.(e) The process of separating the various constituents of petroleum is known as __________.(f) Excessive burning of fossil fuels is a major cause of __________.
- Why are coal and petroleum known as fossil fuels?
- (a) What happens when carbon burns in air? Write the chemical equation of the reaction which takes place.(b) Why are coal and petroleum called fossil fuels? (c) Explain how coal was formed in the earth. (d) Describe how petroleum was formed in the earth. (e) Name a fossil fuel other than coal and petroleum.
- What happens when coal is heated in air? State the uses of coal.
- Why should fossil fuels like coal and petroleum be used judiciously?
- Fill in the following blanks with suitable words:(a) Fossil fuels are…………and…….(b) Coal contains mainly……………(c) The slow process of conversion of dead vegetation into coal is called……………(d) The process of separation of different constituents from petroleum is called………………(e) The least polluting fuel for vehicles is…….(f) The burning of fossil fuels causes air………….and also leads to global……………
- How long are the energy resources of the earth like coal, petroleum and natural gas expected to last?
- What are the constituents of coal gas? State one use of coal gas.
- Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.Air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen
- Name a fossil fuel other than coal and petroleum.
- Name the product of coal which is thick black liquid having an unpleasant smell.
- Classify the following as exhaustible and inexhaustible natural resources- air, sunlight, water, forests, wildlife, coal.
- The Bishnoi community of Rajasthan is associated with the conservation of:(a) coal and petroleum (b) forests and wildlife (c) water resources (d) abiotic environment
- What are the differences between coal and petroleum?
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