IBChemistrySLTopic QuestionsWhat are the Mechanisms of Chemical Change?Electron Pair Sharing Reactions

Syllabus Edition

First teaching 2023

First exams 2025

|

Electron Pair Sharing Reactions (SL IB Chemistry)

Topic Questions

1 hour23 questions

Select a question set to download for
Electron Pair Sharing Reactions

Select an answer set to view for
Electron Pair Sharing Reactions

Easy
Medium
Hard
11 mark

Which of these compounds would act as a nucleophile?

  • C2H6

  • H+

  • OH-

  • Al

Choose your answer

Did this page help you?

21 mark

Ethene reacts with steam in the presence of sulfuric acid.

C2H4  +  H2O →  CH3CH2OH

What type of reaction is this?

  • acid / base

  • addition

  • hydrolysis

  • substitution

Choose your answer

Did this page help you?

31 mark

Which reaction is an example of nucleophilic substitution?

  • C6H6 + Br2 → C6H5Br+ HBr

  • CH2=CH2 + HBr → CH3CH2Br

  • C3H7Br + H2O → C3H7OH + HBr

  • C2H6 + Br2 → C2H5Br + HBr

Choose your answer

Did this page help you?

41 mark

Bromomethane, CH3Br, is used as a fumigant to destroy insect pests in grain that is to be stored. It can be made by reacting methanol with hydrogen bromide.

CH3OH  +  HBr  →  CH3Br  + H2O

What type of reaction is this?

  • condensation

  • electrophilic substitution

  • free radical substitution

  • nucleophilic substitution

Choose your answer

Did this page help you?

51 mark

What reagents and conditions are needed to convert but-2-ene into butane?

  • Concentrated sulfuric acid, steam, 300oC

  • Hydrogen gas, Ni catalyst, 150oC

  • Acidified potassium dichromate, heating under reflux

  • Hydrogen bromide, room temperature

Choose your answer

Did this page help you?

61 mark

Which reaction(s) can alkenes undergo? 

  1. Addition
  2. Hydration
  3. Reduction

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

Choose your answer

Did this page help you?

11 mark

Isomers X and Y both react with HBr.7KgQdxfW_10-2-m-q2-ib-chemistry-mcqs

 A mixture of X and Y is reacted with HBr.

Which three structures represent three different possible products of this reaction?

 A  

(CH3)2CHCBr3

   (CH3)2CBrCHBr2

 CH3CHBrCHBrCH3

B

(CH3)2CHCBr3

(CH3)2CBrCHBr2

CH3CBr2CHBrCH3

C

(CH3)2CBrCBr3

(CH3)2CHCBr3

CH3CBr2CHBrCH3

D

(CH3)2CBrCHBr2

CHBr2CBr(CH3)CH3

CH3CHBrCBr2CH3

    Choose your answer

    Did this page help you?

    21 mark

    In the hydrolysis of bromoethane by aqueous sodium hydroxide, what is the nature of the attacking group and of the leaving group?

     

     

    attacking group

    leaving group

    A

    B

    C

    D

    electrophile

    electrophile

    nucleophile

    nucleophile

    electrophile

    nucleophile

    electrophile

    nucleophile

      Choose your answer

      Did this page help you?

      11 mark

      Limonene is an oil formed in the peel of citrus fruits.10-2-h-q1-ib-chemistry-mcqs

      Which product is formed when an excess of bromine, Br2(l), reacts with limonene at room temperature in the dark?10-2-h-q1-i-ib-chemistry-mcqs

        Choose your answer

        Did this page help you?

        21 mark

        Which compound has an Mr of 84.18 and will react with HBr to give a product with an Mr of 165.09?10-2-h-q3-ib-chemistry-mcqs

          Choose your answer

          Did this page help you?

          31 mark

          Which compound is produced in the reaction between pent-2-ene and steam?

          • (CH3)2CHCH2CH2OH

          • CH3CH(OH)CH2CH2CH2CH3

          • CH3CH2CH2CH2CH2OH

          • CH3CH2CH2CH(OH)CH3

          Choose your answer

          Did this page help you?