Industrial Synthesis of Ethers using Bimolecular Condensation
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Synthesis of Ethers by Alkoxymercuration-Demercuration
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Possible route of synthesis:

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Cleavage of Ethers
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Answer: C
Synthesis of Epoxides
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Answer: A

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Reactions of Epoxides
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Answer: D
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Possible route of synthesis:

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Reactions of Epoxides with Grignard and Organolithium Reagents
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Answer: B