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1
When fossil fuels are burned, they release ___________________ into the atmosphere, which contribute to the formation of acid rain.
Nitrogen oxides
Oxides
Hydrogen gas
None of these
2
Coal and petroleum are important ______________________ fossil fuel.
Non renewable
Renewable
Recyclable
None of these.
3
What are the ways to conserve fossil fuels ?
Judicious use of the existing resources.
Use of alternate sources of energy.
Conversion into efficient forms like CNG.
All of these.
4
Which of the following forms of carbon has the lowest percentage of carbon ?
Lignite
Anthracite
Peat
Bituminous
5
Higher the Calorific Value of a fuel the _______________ heat it produces when burned.
more
less
same
6
What should be the important characteristics of fuel ?
It should have a high calorific value.
It should be easily available.
It should be fairly cheap.
7
The _________________ temperature at which a fuel catches fire is termed as its ignition temperature.
Minimum
Maximum
Normal
8
What is the dominant component of natural gas ?
Carbon dioxide
Methane
Oxygen
All of the above
9
Petroleum is commonly called as ___________________
Black gold
Yellow gold
Green gold
Blue gold
10
The substances which have very low ignition temperature will ____________
Catch fire easily
Will not catch fire
Catch fire after some time
11
The product obtained by the dry distillation or destructive distillation of coal is __________________
Natural gas
Water gas
Producer gas
Coal gas
12
Which of the following form of carbon is used in the manufacture of steel?
Coal
Coke
Coal tar
13
The residue left behind after the dry distillation of coal is ______________________
Ammonical liquor
14
Which of the following are correct :
(a) Coal and petroleum are important non renewable fossil fuel.
(b) Coal and petroleum are important renewable fossil fuel.
(c) The increasing demand of fossil fuels and usage is resulting in depletion of these useful resources.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
15
Biogas is a mixture of _____________________
Methane + CO
ethane + CO