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Consider the following statements:
1. The normal paraffins are the best fuels for Cl engines.
2. Heating value of hydrogen is higher than carbon.
3. Paraffins have lower heating value than aromatics.
4. Fuels with fewer atoms are more volatile,
  • a)
    1,2, 3 and 4
  • b)
    1,2 and 3
  • c)
    1,2 and 4
  • d)
    2, 3 and 4
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements:1. The normal paraffins are the best...
Understanding the Statements
To evaluate the correctness of the statements regarding fuels and their properties, let’s analyze each one:
1. The normal paraffins are the best fuels for Cl engines.
- Normal paraffins, also known as alkanes, have a straight-chain structure which leads to efficient combustion. This makes them suitable fuels for compression ignition (Cl) engines.
2. Heating value of hydrogen is higher than carbon.
- Hydrogen has a higher heating value (energy content per unit mass) than carbon. When burned, hydrogen produces more energy per kilogram compared to carbon, making it an excellent fuel.
3. Paraffins have lower heating value than aromatics.
- This statement is generally incorrect. Aromatic compounds tend to have higher heating values due to their stable ring structures and higher carbon content compared to paraffins.
4. Fuels with fewer atoms are more volatile.
- Volatility refers to how readily a substance vaporizes. Fuels with fewer atoms typically have lower molecular weights and higher vapor pressures, making them more volatile.
Conclusion
Based on the analysis:
- Correct Statements: 1, 2, and 4
- Incorrect Statement: 3
Therefore, the correct answer is option 'C' (1, 2, and 4), as it includes only the accurate statements about the properties and performance of fuels.
These insights are crucial for understanding fuel selection in mechanical engineering applications, especially in engine design and performance optimization.
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Consider the following statements:1. The normal paraffins are the best fuels for Cl engines.2. Heating value of hydrogen is higher than carbon.3. Paraffins have lower heating value than aromatics.4. Fuels with fewer atoms are more volatile,a)1,2, 3 and 4b)1,2 and 3c)1,2 and 4d)2, 3 and 4Correct answer is option 'C'. Can you explain this answer?
Question Description
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