TNPSC Group 1 2025 Prelims GS Question Paper Exam Date 15.06.2025 [Fully Solved]

1. Which of the statements are True? (i) Octane number increases with chain length. (ii) Cycloalkanes have higher Octane number than straight chain alkanes. (iii) Alkenes and aromatic hydrocarbons have higher Octane number than straight chain alkanes. (iv) Branched chain alkanes have lower octane number than straight chain alkanes. (A) (i) and (iv) (B) (i) …

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