4 = Fill in the blanks.
(a) Fossil fuels are
and
(b) Process of separation of different constituents from petroleum is
called
(c)
Least polluting fuel for vehicle is
5 = Tick True/False against the following statements,
(a)
Fossil fuels can be made in the laboratory.
(T/F)
(b)
CNG is more polluting fuel than petrol.
(T/F)
(c)
Coke is almost pure form of carbon.
(T/F)
(d)
Coaltar is a mixture of various substances.
(T/F)
Kerosene is not a fossil fuel.
(T/F)
(please answer these questions )
Answers
Answer:
a) Fossil fuels are Coal, Petroleum and Natural Gas.
b) Process of separation of different constituents from petroleum iscalled refining.
c) Least polluting fuel for vehicles is Compressed Natural Gas(CNG).
5.(a) Fossil fuels can be made in the laboratory. False
(b) CNG is more polluting fuel than petrol. False
(c) Coke is almost pure form of carbon. True
(d) Coal tar is a mixture of various substances. True
(e) Kerosene is not a fossil fuel. False
Answer:
4.
(a) Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals
(b) Process of separation of different constituents from petroleum is called refining.
(c) Least polluting fuel for vehicles is Compressed Natural Gas(CNG).
5.
a. F - These are made naturally under the earth in thousands of years.
b. F - C.N.G. is compressed methane which is least polluting of all fuels.
c. T - It is the purest form of carbon.
d. T - It is a mixture of coal, phenols, benzene and other chemicals.
e. F - It is one of the products of distillation of petroleum products.