Which one of the following petroleum refinary products has the lowest boiling point ?

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Q: 117 (CDS-I/2009)
Which one of the following petroleum refinary products has the lowest boiling point ?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,20,20,11,5,20,4

keywords: 

{'lowest boiling point': [0, 0, 1, 0], 'petroleum': [3, 1, 3, 10], 'kerosene': [2, 2, 3, 2], 'diesel': [1, 0, 0, 1], 'oil': [8, 3, 14, 21], 'gasoline': [0, 1, 1, 1], 'refinary products': [0, 0, 1, 0]}

The correct answer is option 3 - gasoline.

Gasoline has the lowest boiling point among the given options. Boiling point refers to the temperature at which a substance changes from a liquid to a gas. Gasoline is a highly volatile and flammable liquid fuel that is used in internal combustion engines. It is produced in the refining process of crude oil, where it is separated from other components based on their boiling points.

Kerosene, option 1, has a higher boiling point than gasoline. It is a combustible hydrocarbon liquid that is commonly used as jet fuel and heating oil. Diesel, option 2, also has a higher boiling point than gasoline. It is a heavier, less volatile fuel that is used in diesel engines.

Lubricating oil, option 4, has the highest boiling point among the given options. It is a thick, viscous oil that is used to reduce friction and wear in machinery. Lubricating oil has a higher boiling point to ensure that it remains in a liquid state at high temperatures, which allows it to effectively lubricate machinery.

Therefore, option 3 - gasoline has the lowest boiling point compared to kerosene, diesel, and lubricating oil.