Fill in the blanks:
Fossil fuels are ……, ……. and ……..
Process of separation of different constituents from petroleum is called ……..
Least polluting fuel for vehicle is ………..

Academic Chemistry NCERT Class 8

Fossil fuels are coal, petroleum, and natural gas
Process of separation of different constituents from petroleum is called refining.
Least polluting fuel for vehicle is CNG.

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Updated on: 17-Mar-2023

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Fill in the blanks.(a) Fossils fuels are ____ , ____ and ____(b) Process of separation of different constituents from petroleum is called ______(c) Least polluting fuel for vehicle is ______
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……………
Why is petroleum called a fossil fuel?
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 __________.
Fill in the Blanks:The process of obtaining food necessary for 0/10/1 good health and growth is called........................
(a) What is petroleum? Where does petroleum occur?(b) Describe the process of formation of petroleum.
What is the process of removing seeds from cotton called?
Write some important uses of the various constituents of petroleum.
Why are coal and petroleum known as fossil fuels?
What is the process of producing silk is called?
Explain the process of separation of sand that is mixed with water.
Fill in the blanks:Circles having the same centre and different radii are called …….. circles.
The calorific value of a fuel is 40000KJ/kg. This fuel is most likely to be:biogasmethanehydrogen gasliquefied petroleum gas
Why is petroleum called black gold?
Fill in the blanks:The mixture of solute and solvent is called as ______.

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