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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
How can you as an individual contribute or make a difference to the management of coal and petroleum
Why are coal and petroleum categorised as natural resources? Give a reason as to why they should be used judiciously.
Choose one term from the following which include all others :
coal, natural gas, fossil fuels, petroleum
Fill in the following blank with suitable word :
When a fuel burns in an insufficient supply of air, then some poisonous gas called ......... is also produced.
Although coal and petroleum are produced by the degradation of biomass, even then we need to conserve them. Why?
State any five steps to reduce the consumption of coal and petroleum products.
There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky.
(a) What are (i) fuel A, and (ii) fuel B?
(b) Name (i) C (ii) D (iii) E, and (iv) F
(c) What is the process of formation of F during lightning known as?
(d) Which fuel is supposed to be exhausted sooner : A or B?
(e) Which fuel is mostly used for generating electricity at thermal power plants?
What are fossil fuels?
Write two disadvantages of burning fossil fuels.
We say fossil fuels will last only for a few hundred years. Comment.
