Chemistry
Grade-8
Easy
Question
Which of the following statements is incorrect?
- Coal gas is used as an industrial and household fuel.
- Peat form of carbon is hardest than the lignite form.
- Water gas is a mixture of carbon monoxide and hydrogen gas.
- Hard coke is a lustrous substance and is used in industrial furnaces.
Hint:
Coal quality depends on its carbon content. Coal with the highest carbon content is the cleanest because it minimizes losses. Hard coal contains more carbon than soft coal because the moisture content of these coals is very low.
The correct answer is: Peat form of carbon is hardest than the lignite form.
The correct option is b)Peat form of carbon is hardest than the lignite form.
Lignite, also called lignite, is a soft, brown, combustible sedimentary rock formed from naturally compacted peat. Due to its relatively low heat content, its carbon content is around 20% to 35%, the worst in the coal category. It is mined all over the world and used only as a fuel to generate electricity from steam. Peat has a low carbon content (30-40%) and a high water content.
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