This question is based on the five compounds (A-E) given below. (A) CH;-CH=CH, (B) CH;-CHBr-CH2-CH; (C) cyclopropane (D) CH;-CH,-C(Br)(CH3)-CH2-CH; (E) CH;-CH,-CH=CHB. 1. Label compounds A-E as either saturated or unsaturated. 2. Which of the compounds, A-E are constitutional isomers of each other? 3. Which of the compounds, A-E, is/are optically active? Explain. 4. Would any of the five compounds react with Lucas' reagent? Explain.

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Alkynes

Alkynes are organic compounds that contain at least one triple bond between carbon-carbon atoms. They are a series of unsaturated compounds with a general molecular formula, CnH2n-2.