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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
Kerosene is not a fossil fuel.
Although coal and petroleum are produced by the degradation of biomass, even then we need to conserve them. Why?
Why should fossil fuels like coal and petroleum be used judiciously?
State any five steps to reduce the consumption of coal and petroleum products.
Which of the following combination of terms has no fossil fuel?
(a) wind, ocean, coke
(b) kerosene, tide, wind
(c) wood, wind, sun
(d) petrol, wood, sun
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?
Which of the following is not a constituent of petroleum?
Name the petroleum product used as fuel for stoves, lamps and jet aircrafts.
Excessive burning of fossil fuels is a major cause of ______.
We read in newspapers that burning of fuels is a major cause of global warming. Explain why.
