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Year: 2024
Topic: Organic Chemistry – Some Basic Principles and Techniques
1. The most stable carbocation among the following is:

(1).

(2).

(3).

(4).

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Year: 2024
Topic: Organic Chemistry – Some Basic Principles and Techniques
2. On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is konwon as

(1).Distillation

(2). Chromatography

(3). Crystallization

(4). Sublimation

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Year: 2025
Topic: Organic Chemistry – Some Basic Principles and Techniques
3. Which one of the following compounds can exist as cis-trans isomers?

(1).1,2-Dimethylcyclohexane

(2). Pent-1-ene

(3). 2-Methylhex-2-ene

(4). 1,1-Dimethylcyclopropane

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Year: 2025
Topic: Organic Chemistry – Some Basic Principles and Techniques
4. Which one of the following reactions does NOT belong to "Lassaigne's test"?

(1).Figure

(2). Figure

(3). Figure

(4). Figure

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