Last-Minute Buddha Foot Hugging Topics For Chemistry MCQs

Topical Checklist For O-Level Chemistry Paper 1

Acids, Bases & Salts

• Acid reactions
• Base reactions
• Types of oxides
• Solubility Table
• Methods of Salt Preparation

Mole Concepts

• 5 steps to find your empirical formula:

  1. mass
  2. atomic mass (Ar)
  3. no. of moles
  4. ratio
  5. empirical formula

• 3 steps to solve mole concept problems:

  1. Write BALANCED equation
  2. Find the no. of moles
  3. Find the limiting reactant

Organic Chemistry

• Reactions of Alkane, Alkene, Alcohol, Carboxylic Acids
• Characteristics of homologous series
• Isomers
• Addition Polymerisation

Metals

• Remember the following tables in your textbook:

  • Reactions of metals with water
  • Reduction of metal oxides with carbon
  • Reduction of metal oxides with hydrogen
  • Thermal decomposition of metal carbonates
  • Thermal decomposition of metal nitrates
  • The 5 reactions in the extraction of iron
• Reactivity Series

Identification of Ions & Gases

• Test for cations
• Test for anions
• Test for gases

Redox

• Examples of reducing and oxidizing agents
• Colour changes of agents
• To determine if a substance undergoes oxidation or reduction, always find the oxidation state of the element of interest within the substance

Energy Changes

• Examples of endothermic and exothermic reactions.

Rate of Reaction

• Factors affecting rate:

  1. temperature
  2. pressure
  3. catalyst
  4. surface area & volume
• The only factor affecting rate AND the amount of product formed is concentration of reactant.