Tag: substances, objects and energy
Questions Related to substances, objects and energy
The medium which retains and interacts with a pollutant is:
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receptor
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sink
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both $A$ and $B$
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system
Sink acts as a medium which retains and interacts with a pollutant.
Biofuels are different from fossil fuels in regard to greenhouse gases but are similar to fossil fuels in that biofuels contribute to air pollution
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True
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False
Fuels extracted from plants and crops are known as biofuels. They not only help a struggling economy by providing jobs but also helps in reducing greenhouse gases up to much extent by emitting less pollution.
A liquid fuel used in homes is:
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Water
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LPG
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CNG
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Cooking oil
Cooking oil or Vegetable oil can be used as an alternative fuel in diesel engines and in heating oil burners. When vegetable oil is used directly as a fuel, in either modified or unmodified equipment, it is referred to as straight vegetable oil (SVO) or pure plant oil (PPO). Conventional diesel engines can be modified to help ensure that the viscosity of the vegetable oil is low enough to allow proper atomization of the fuel. This prevents incomplete combustion, which would damage the engine by causing a build-up of carbon. Straight vegetable oil can also be blended with conventional diesel or processed into biodiesel or bioliquids for use under a wider range of conditions.
Hence, the correct option is $D$
Biomass can be converted into fuels by:
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thermal conversion
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biochemical conversion
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chemical conversion
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all of the above
Biomass is an organic material that comes from plants and animals and it is a renewable source of energy.
Which is the ultimate source of energy?
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Sun
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Uranium
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Fossil fuels
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Water
The ultimate source of energy is Sun because it is continuously providing us with energy and is the source of all other energies like light energy, heat energy, etc.
In a hydropower plant :
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electricity is extracted from water
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water is converted into steam to produce electricity
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potential energy possessed by stored water is converted into electricity
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kinetic energy possessed by stored water is converted into potential energy
In hydropower plant, the potential energy possessed by the stored water is converted into electricity with help of a turbine of an electric generator.
A biofuel is produced by:
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agricultural digestion
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anaerobic digestion
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geological process
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all of the above
$\Rightarrow$ Bio-fuels are designed to replace gasoline, diesel fuel and coal, which are called “fossil fuels” because they are made from animals and plants that died millions of years ago.
Identify from the following a conventional source of energy.
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Solar Energy
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Tidal Energy
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Natural Gas
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Bio Energy
Conventional energy directly mean the energy source which is fixed in nature like oil, gas and coal. In other words conventional energy is also termed as non-renewable energy sources. Their use leads to increased greenhouse gas emissions and other environmental damage. Natural gas is a fossil fuel used as a source of energy for heating, cooking, and electricity generation. It is also used as fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals. It is a non-renewable resource.
Major constituent of LPG is:
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ethene
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butane
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propane
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pentane
Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles. The percentage of butane is around 70% and that of propane is around 30%.
L.P.G. is a hydrocarbon consisting of a mixture of:
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methane and butane
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propane and butane
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ethane and propane
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ethane and butane
Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles. The percentage of butane is around 70% and that of propane is around 30%.