logo

Learning objective

Explain the characteristics of alkenes based on their addition reactions with: (a) bromine or aqueous bromine, (b) hydrogen in the presence of a nickel catalyst, and (c) steam with an acid catalyst, including drawing the structural or displayed formulae of the resulting products.

Read the explanation, check the common trap, then practise with flashcards and questions.

Practise this topicRead the exam answerTopic hub

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE ChemistryOrganic chemistrySupplement content

Study support

Understand this objective

Quick explanation

Explain the characteristics of alkenes based on their addition reactions with: (a) bromine or aqueous bromine, (b) hydrogen in the presence of a nickel catalyst, and (c) steam with an acid catalyst, including drawing the structural or displayed formulae of the resulting products

  • This point belongs to Alkenes, especially Alkenes outcomes.
  • You need to be able to explain the characteristics of alkenes based on their addition reactions with: (a) bromine or aqueous bromine, (b) hydrogen in the presence of a nickel catalyst, and (c) steam with an acid catalyst, including drawing the structural or displayed formulae of the resulting products.
  • The key ideas to know are Describe and Draw.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeDraw

Why it matters

This objective helps connect Alkenes outcomes to exam-style questions, flashcards, and revision notes for Alkenes.

Revision tools

Choose how to practise

Back to topic hub
Flashcards10 linked cards

Flashcard 1 of 10

Press Space to flip, arrows to move
Practice Questions7 linked questions

Question 1 of 7

Choose an answer, get feedback, then move sideways through the set.

0 of 5 attempted

Paper 4 structured question: Alkenes

Paper 4Theory (Extended)1 marks

Description

Reactions of Alkenes

Alkenes can undergo various addition reactions. For example, when ethene reacts with bromine, it forms dibromoethane. When ethene is hydrogenated in the presence of a nickel catalyst, it forms ethane. Additionally, when ethene reacts with steam and an acid catalyst, it produces ethanol.

  1. a

    State the product formed when ethene reacts with bromine.

    Aim for approximately 1 distinct marking point.

    [1]
Revision notestopic notes

Open the full topic revision notes when you are ready to review this objective in context.

Open revision notes

Related learning objectives

Revision hubs

Move back to a broader study route

Cambridge IGCSEChemistry resources