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प्रश्न
You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two?
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उत्तर
Decantation can be used to separate a mixture of petroleum and water. The mixture is allowed to stand. Petroleum is lighter than water, so it floats over water.
Carefully, lighter layer of petroleum can be poured and separated without disturbing the heavier layer of water.
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संबंधित प्रश्न
Which fossil fuel is conserved when we save on electricity?
Choose one term from the following which include all others :
coal, natural gas, fossil fuels, petroleum
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?
List the products of combustion of fossil fuels. What are their adverse effects on the environment?
Write two disadvantages of burning fossil fuels.
Name the petroleum product used as fuel for stoves, lamps and jet aircrafts.
Coal and petroleum are formed from the dead remains of organisms and are known as ______.
Write some important uses of the various constituents of petroleum.
Give reason for the following:
Petroleum is considered a harmful source of energy.
