Elimination from halogenoalkanes

Elimination from halogenoalkanes Quiz

Spec 3.3.3.2 · AQA A-Level Chemistry: Quiz

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5 questions, one answer each

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  1. 1. What is the role of the hydroxide ion in the elimination of HBr from a halogenoalkane?

    • A. Nucleophile
    • B. Electrophile
    • C. Base
    • D. Oxidising agent

  2. 2. Which reagent and conditions favour elimination from 2-bromopropane?

    • A. Aqueous KOH, warm
    • B. Ethanolic KOH, heated
    • C. Dilute HCl, warm
    • D. Aqueous KOH at room temperature

  3. 3. Which is the organic product of elimination from 2-bromopropane?

    • A. Propan-2-ol
    • B. Propan-1-ol
    • C. Propane
    • D. Propene

  4. 4. In the substitution mechanism, where does the hydroxide ion attack?

    • A. The hydrogen on the adjacent carbon
    • B. The bromine atom
    • C. The δ+ carbon bonded to bromine
    • D. The C=C bond

  5. 5. A student heats 2-bromopropane with ethanolic KOH and passes the gas into bromine water. What is observed, and why?

    • A. The bromine water stays orange because the gas is a saturated alkane
    • B. The bromine water turns colourless because the gas contains a C=C bond
    • C. The bromine water turns colourless because the gas is an alcohol
    • D. The bromine water turns white because KBr precipitates

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