Statement I is true. Petroleum is a complex mixture primarily composed of hydrocarbons, which vary in size, structure, and density. Statement II is also true. The physical and chemical properties, and thus the 'grade' (e.g., light/heavy crude, different viscosities), of petroleum depend heavily on the specific blend and relative proportions of the various hydrocarbons present. These proportions directly influence density, boiling point range, viscosity, etc., which define different petroleum grades. Statement II explains the significance of the composition mentioned in Statement I.
Directions : The following 05 (Five) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the answers to these items using the code given below : Code : Both the Statements are individually true and Statement II is the correct explanation of Statement I. Both the Statements are individually true but Statement II is not the correct explanation of Statement I. Statement I is true but Statement II is false. Statement I is false but Statement II is true. 51. Statement I: Petroleum is a mixture of many different hydrocarbons of different densities. Statement II: The grade of petroleum depends mainly on the relative proportion of the different hydrocarbons.
Asked in UPSC NDA 1 2016 · Topic: Hydrocarbons (Alkanes: Preparation, Physical and Chemical Properties)
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Answer: A. Both the Statements are individually true and Statement II is the correct explanation of Statement I.
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