Conservation of fuels - class-IX

Naphthalene balls are the product of coal tar. Coal tar is obtained form coal.

Petrochemicals are the products of petroleum by which different types of fibres like nylon, polyester and acrylic all are prepared. 

Natural gas which is obtained from petroleum produces hydrogen gas. Hydrogen gas is used as fertilizer in the fields.

Coal tar is a distillation product of coal which is a limited natural resource. Coal tar is a black coloured product of coal with an unpleasant smell.

Petrochemicals are the products of petroleum and natural gases. Like liquefied petroleum gas used as domestic fuel in the house hold. 

Natural gas is a naturally occurring gas mixture consisting primarily of methane, but including higher alkanes and sometimes a small percentage of $CO _2,N _2,H _2S$ or helium.

B, Population is the primary reasons for finishing resources fastly.  As population has increased, the demand of these resources have also increased.

Both unlimited consumption and wastage of natural resources contribute to their depletion. Therefore, both factors are responsible.

To overcome the energy crises more amount of renewable sources of energy must be used because renewable sources of energy can be used again and again and solar energy is a renewable source of energy.

Some natural resources such as coal and petroleum are limited as they are non-renewable resources.

An inexhaustible resource is one that is replaceable, while an exhaustible resource is not replaceable, hence wind, sunlight and water are inexhaustible resources while other are exhaustible resources.

Petroleum Conservation Research Association advises people on how to save petrol/diesel while driving.

A natural resource is anything that people can use which comes from nature. People do not make natural resources, but gather them from the earth. A non-renewable resource is a resource that does not grow and come back or a resource that would take a very long time to come back. For example, coal is a non-renewable resource. 

In India, the Petroleum Conservation Research Association(PCRA) advises people how to save petrol/diesel while driving. 

A non-renewable resource does not renew itself at a sufficient rate for sustainable economic extraction in meaningful human time-frames. Earth minerals, metal ores, fossil fuels and groundwater in certain aquifers are all non-renewable resources.
In contrast, resources such as timber and wind (used to power energy conversion systems) are considered renewable resources.

Energy crisis is any significant bottleneck in supply of energy resources to an economy. It occurs generally by-

Natural resources should be used wisely because most of them are exhaustible and cannot be replenished or take million years to replenish. CNG is the cleanest fuel and hence should be used instead of petrol. People should also adopt car pooling to prevent excessive use of fuel and also protect from pollution.

Petrol is a limited resource and can be exhausted if not used wisely. Natural gas is stored under high pressure as CNG. CNG can be used as a fuel instead of petrol as it is less polluting. It is a cleaner fuel. 

In India, the Petroleum Conservation Research Association(PCRA) advises people how to save petrol/diesel while driving. Their tips include driving at a constant and moderate speed as far as possible, switching off the engine at traffic lights or at a place where you have to wait, ensuring correct tyre pressure, ensuring regular maintenance of the vehicle, etc.

Coal gas is a flammable gaseous fuel made from coal and supplied to the consumer through a piped distribution system. It is a byproduct of the destructive distillation of coal.

Petroleum is the limited natural product which is obtained from the sea. The layer of the petroleum is obtained on the upper layer of seawater. 

Dry cleaning is the procedure of cleaning clothes by using chemical solvents (the substance which can dissolve in other substance ). Petrol is a chemical which is used as a solvent for dry cleaning of clothes.

Natural gas is product of petroleum which is used in the form of compressed natural gas and transported through pipes. 

Petroleum is formed from the remains of ancient marine organisms (plankton and algae) that were buried under layers of sediment and subjected to high pressure and temperature over millions of years.

1. The first oil well in India was dug in 1867 AD in Makkum in Assam (This was the first oil well dug in Asia).

Average wind velocity and local environmental (geographical) parameters are the basis of deciding the parameters like the height and the number of blades of a windmill. So, during windmill design, all the factors mentioned are taken care of.

The law of conservation of energy states that the total energy of an isolated system remains constant, it is said to be conserved over time. This law means that energy can neither be created nor destroyed; rather, it can only be transformed from one form to another.

Vaseline is made from paraffin wax. It is a is a brand of petroleum-jelly based products. In many languages, the word "Vaseline" is used as generic for petroleum jelly.

Conventional energy sources includes oil, gas and coal. These conventional sources are usually fossil fuels. Their use leads to increased greenhouse gas emissions and other environmental damage.These sources of energy are also called non renewable sources. These sources of energy are in limited quantity except hydro-electric power. These include commercial (coal, petroleum, electricity etc..) and non-commercial (fire wood, straw, dried dung etc.. ).

There are many ways to conserve energy resources like coal or petroleum.

A .Because of the population explosion (rapid increase in population) in the world with limited resources, our natural resources are depleting.

Non-renewable resources such as coal, petroleum and natural gas are finishing fastly due to increase in population and industrialisation which results in increased demands of these resources. A non renewable resources is a resources of economic value that cannot be readily replaced by natural means on a level equal to its consumption. 

Non-renewable resources take millions of year to get replenished. So it can extinct in the near future.

Cars, bikes and aeroplanes are operating on petrol, diesel and kerosene, which are extracted from oil. If they disappear on earth, all of them stop running.

B, Vehicles are secondary reasons for finishing resources as number of vehicles are increasing day by day which results in great demand of fuels. 

To conserve materials, it is necessary to use them in the limited amount. We need  to use it judiciously for sustainable development. We need to conserve our natural resources because it is the main source of our daily needs. We need to conserve it because they are limited only. And if these resources are abused and harmed, we will have short quantity of sources for food and living.

The correct option is A if materials will be finished then people will struggle for electricity as it is produced by using coal in the thermal power plant. 

Covering pans keeps the heat in the pan, cooking the food. 

C is the correct option.if resources are finished then people will struggle for both CNG and LPG as both are obtained from fossils.They cannot be replenished soon.

Trees are renewable resource of fuel as they can be planted new and can be recreated. So renewable natural resources are Trees. Hence, option A is correct.

                            	<span class="ng-binding">Advantage of use of natural gas as fuel is that natural gas releases fewer pollutants which can decrease the pollution.</span><div><span class="ng-binding"><br>Hence option B is correct.<br></span></div>

Coal reserves may last for a few hundred years but at the present rate of consumption, the present coal reserves might run out of coal sooner than expected.

Excessive burning of fossil fuels is a major cause of "GLOBAL WARMING".

Explanation :
Carbon dioxide (CO2), which, while not  the most potent greenhouse gas, 

is nevertheless the main driver of the greenhouse effect. When fossil fuels - coal, oil and natural gas - are burnt they release CO2 into the atmosphere. Because of this, the layer of greenhouse gas is getting thicker, which is, in turn, making the Earth warmer. Thus the ongoing unlimited burning of fossil fuels is the cause of climate change and global warming.

The main component of natural gas is methane $CH _4$ some other gases like butane ethane are also present.
Hence option A is correct.

Use
of public transport system instead of private vehicles decreases the
pollution as many people use only one vehicle which consume less fuel.It decreases the fuel consumption and pollution.
Hence option B is correct.

                            	<span class="ng-binding">Natural gas is best to use as fuel because it produces less pollution and more efficiency.Less quantity is needed for more work.<br>Hence option D is correct.<br></span>

Deforestation 
is decrease in number of trees in forest so this leads to in decrease
the photosynthesis process which in turn increases the pollution.
Hence option A is correct.