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CAIE IGCSE Chemistry Multiple Bonds in Simple Molecules

Practise drawing double and triple covalent bonds in molecules, balancing shared and non-bonding electrons so every outer shell is complete.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • draw two shared pairs for a double bond or three shared pairs for a triple bond
  • complete carbon dioxide, oxygen or nitrogen diagrams with the correct lone pairs on each atom
  • use a displayed formula to place single and multiple bonds without adding surplus electrons

2.5.4—Formation of covalent bonds in simple question 1

[Maximum number: 3]

Solid sodium hydroxide is a base which dissolves to form an aqueous solution, NaOH(aq).

Ethanoic acid, CH3COOH\mathrm{CH}_{3} \mathrm{COOH}, is a weak acid.

Complete the dot-and-cross diagram in Fig. 4.1 of a molecule of ethanoic acid.

Fig. 4.1

Fig. 4.1

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