Consider the following statement about coal: The superior quality coal...
Ans: c
Explanation: Coal- Its common variety is bituminous which is like hard stone and burns with smoky flames. The superior quality coal burns without smoke is called anthracite. It formed out of carbonization of organic and fossil matter buried deep into the earth, under high pressure and high temperature with very-very limited supplies of air, during centuries. Anthracite, bituminous lignite and peat are the types of coal with decreasing Carbon%.
Uses;-
1. It used as a fuel.
2. It is used in the manufacturing of coal gas.
3. The by-product of this process are cock, coal-tar, ammoniac liquor. Coal-tar is a source for making dyes, explosives, chemical etc.
4. It is also used in manufacturing fuel gases like producer gas, water gas and semi water gas.
5. It is used for manufacturing of synthetic petrol by catalytic hydrogenation of coal.
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Consider the following statement about coal: The superior quality coal...
The correct statement is option 'C': Only III is correct. Let's analyze each statement to understand why.
Statement I: "The superior quality coal burns without smoke is called bituminous."
This statement is incorrect. Bituminous coal is not known for burning without smoke. In fact, bituminous coal is known to produce more smoke and soot compared to other types of coal. It is a relatively soft coal with a high carbon content and is commonly used for generating electricity and industrial purposes. Therefore, option 'A' is incorrect.
Statement II: "Anthracite, bituminous, lignite, and peat are the types of coal with increasing Carbon%."
This statement is incorrect. The order of coal types mentioned in the statement is incorrect. The correct order of coal types based on increasing carbon content is peat, lignite, bituminous, and anthracite. Peat has the lowest carbon content, followed by lignite, bituminous, and anthracite, which has the highest carbon content. Therefore, option 'B' is incorrect.
Statement III: "Coal is used for manufacturing synthetic petrol by catalytic hydrogenation of coal."
This statement is correct. Coal can be converted into synthetic petrol through a process called catalytic hydrogenation. In this process, coal is reacted with hydrogen in the presence of a catalyst to produce liquid hydrocarbons, which can be further refined into synthetic petrol. This process is important for countries with limited oil reserves as it provides an alternative source of liquid fuel. Therefore, option 'C' is correct.
To summarize:
- Statement I is incorrect because bituminous coal does produce smoke when burned.
- Statement II is incorrect because the order of coal types mentioned is incorrect.
- Statement III is correct because coal can be converted into synthetic petrol through catalytic hydrogenation.
Therefore, the correct statement is option 'C': Only III is correct.