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Q5. With reference to “flammable ice”, recently seen in news, consider the following statements:
1. It consists of methane trapped within water crystals.
2. It is another name for permafrost.
3. All of its reserves are trapped in plateaus at higher latitudes.
4. India is considering it as an alternative energy source.
Select the correct answer using the codes below.

A
a) 1, 3 and 4 only
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B
b) 2 and 3 only
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C
c) 1 and 4 only
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D
d) only
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Solution

The correct option is A a) 1, 3 and 4 only

1. Flammable ice (also known as methane hydrate or methane clathrates)consists of methane trapped within water crystals. It is the world’s largest natural gas resource trapped beneath permafrost and ocean sediment where low temperature and moderate pressure combine to trap methane in this specific way.
2. Permafrost appears on top of it. Permafrost is frozen chunks of ice that often contain carbon and volatile gases.
3. China has successfully produced natural gas from methane hydrate, also known as“flammable ice”, in an experimental project in the South China Sea (SCS).Most of its reserves are located deep in ocean floors, especially continental shelves.
4. India, USA, China and Canada all are looking at it as an alternative energy source.
5. The methane hydrate is highly flammable and energy-intensive fuel as one cubic metre of the compound can releases about 160 cubic metres of gas
6. It can break down into water and methane after temperature is raised or pressure is lowered.


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