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प्रश्न
Match the following.
| Octane rating | Diesel |
| Cetane rating | Methane |
| Simplest hydrocarbon | Petrol |
| Peat | Bown in colour |
| Lignite | First stage coal |
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उत्तर
| Octane rating | Petrol |
| Cetane rating | Diesel |
| Simplest hydrocarbon | Methane |
| Peat | First stage coal |
| Lignite | Bown in colour |
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संबंधित प्रश्न
Process of separation of different constituents from petroleum is called ______.
Which fossil fuel is conserved when we use bicycle for covering short distances instead of a motorbike?
Which of the following is not a natural resource?
(a) soil
(b) water
(c) electricity
(d) natural gas
A person buys two electrical devices P and Q for lighting purposes in his house. The device P consumes only 5 units of electricity in a month but device Q consumes 15 units of electricity in a month when used for the same number of hours daily. The device Q wastes a lot of electricity by radiating energy C but P does not do so.
(a) What type of device is (i) P, and (ii) Q?
(b) Name one component which is present in Q but not in P.
(c) Name the energy C.
(d) Which device is more energy efficient : P or Q?
(e) Which fossil fuel is most likely to be conserved if all of us switch over to devices like P?
What are fossil fuels?
The term petroleum means ________
You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two?
We say fossil fuels will last only for a few hundred years. Comment.
Crude oil is used as a sealant for waterproofing various surfaces.
Give reason for the following:
Petroleum is considered a harmful source of energy.
