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Atoms and reactions

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Question 40

Cyclohexene can be prepared by several different synthetic routes in the laboratory. Which of the following reactions has the lowest atom economy for the production of cyclohexene?

A
C6H11OH→C6H10+H2O \text{C}_6\text{H}_{11}\text{OH} \rightarrow \text{C}_6\text{H}_{10} + \text{H}_2\text{O} C6​H11​OH→C6​H10​+H2​O
B
C6H11Cl+NaOH→C6H10+NaCl+H2O \text{C}_6\text{H}_{11}\text{Cl} + \text{NaOH} \rightarrow \text{C}_6\text{H}_{10} + \text{NaCl} + \text{H}_2\text{O} C6​H11​Cl+NaOH→C6​H10​+NaCl+H2​O
C
C6H11Br+NaOH→C6H10+NaBr+H2O \text{C}_6\text{H}_{11}\text{Br} + \text{NaOH} \rightarrow \text{C}_6\text{H}_{10} + \text{NaBr} + \text{H}_2\text{O} C6​H11​Br+NaOH→C6​H10​+NaBr+H2​O
D
C6H11Br+KOH→C6H10+KBr+H2O \text{C}_6\text{H}_{11}\text{Br} + \text{KOH} \rightarrow \text{C}_6\text{H}_{10} + \text{KBr} + \text{H}_2\text{O} C6​H11​Br+KOH→C6​H10​+KBr+H2​O
Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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