Singapore · SEABQ&A
ChemistryQ&A by dot point
A short Q&A bank for every Singapore Chemistry syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Acids, Bases and Salts
- Describe the properties of acids and bases, use the pH scale and indicators, and explain neutralisation5Q&A pairs
- Distinguish soluble and insoluble salts, describe the preparation of a soluble salt from an acid, and prepare an insoluble salt by precipitation5Q&A pairs
- Describe the reactions of acids with metals, with bases and metal oxides, and with carbonates, and write the equations and identify the gases produced6Q&A pairs
Atomic Structure and Bonding
- Describe the structure of the atom, define proton number and nucleon number, work out the numbers of protons, neutrons and electrons, and draw electron shell arrangements6Q&A pairs
- Describe covalent bonding as the sharing of electrons, draw dot-and-cross diagrams for simple molecules, and relate simple molecular structures to their properties4Q&A pairs
- Describe ionic bonding as the transfer of electrons, work out the formula of an ionic compound, and relate the giant ionic structure to its properties4Q&A pairs
Electrolysis
- Describe electrolysis of aqueous solutions, predict the products using reactivity, and explain the part played by water at the electrodes5Q&A pairs
- Describe electrolysis of a molten binary ionic compound, name the electrodes and products, and explain why the compound must be molten4Q&A pairs
- Describe everyday and industrial uses of electrolysis, including electroplating, and explain how an object is electroplated with a chosen metal6Q&A pairs
Energetics, Rates and Redox
- Describe exothermic and endothermic reactions in terms of energy transfer, interpret simple energy level diagrams, and link energy change to bond breaking and bond making6Q&A pairs
- Define oxidation and reduction in terms of oxygen and of electrons, identify redox reactions, and name simple oxidising and reducing agents5Q&A pairs
- Describe how concentration, temperature, surface area and a catalyst change the speed of a reaction, and explain these using the idea of colliding particles7Q&A pairs
Experimental Chemistry and Separation
- Name common laboratory apparatus and choose suitable apparatus to measure volume, mass, temperature and time, and read each scale correctly6Q&A pairs
- Describe filtration, evaporation, crystallisation, simple and fractional distillation and chromatography, and choose the right method to separate a given mixture7Q&A pairs
- Use melting and boiling points to judge purity, interpret a chromatogram, and carry out simple tests to identify oxygen, hydrogen, carbon dioxide, water and ammonia5Q&A pairs
Metals and Reactivity
- Relate the method of extracting a metal to its reactivity, describe the extraction of iron in the blast furnace, and explain the rusting of iron and how to prevent it5Q&A pairs
- Describe the general physical properties of metals, explain what an alloy is, and explain why alloys are often harder and more useful than pure metals5Q&A pairs
- State the reactivity series, compare the reactions of metals with water and acid, and use the series to predict displacement reactions5Q&A pairs
Organic Chemistry
- Describe ethanol as a member of the alcohols, state how it is made by fermentation, and describe its main uses including as a fuel and solvent5Q&A pairs
- Describe the alkanes as a family of saturated hydrocarbons, write the combustion of a simple alkane, and compare complete with incomplete combustion6Q&A pairs
- Describe the alkenes as unsaturated hydrocarbons, use the bromine water test to distinguish them from alkanes, and describe a simple addition reaction5Q&A pairs
The Particulate Nature of Matter
- Name and describe the changes of state in terms of energy and particle movement, and explain diffusion using the particle model5Q&A pairs
- Define elements, compounds and mixtures, distinguish atoms, molecules and ions, and explain how a compound differs from a mixture6Q&A pairs
- Describe the arrangement, movement and energy of particles in solids, liquids and gases and use the particle model to explain their properties6Q&A pairs
Stoichiometry and the Mole
- Write formulae of common compounds from ion charges, write word equations, and balance symbol equations including state symbols7Q&A pairs
- Use mole ratios from balanced equations to calculate reacting masses, work with concentration of solutions, and find a simple percentage yield6Q&A pairs
- Define relative atomic and molecular mass, define the mole and the Avogadro constant, and interconvert mass, moles and number of particles3Q&A pairs
The Periodic Table
- Describe the properties and trends of Group I metals, Group VII non-metals and the Group 0 noble gases, and link them to electron arrangement3Q&A pairs
- Locate metals and non-metals in the Periodic Table, compare their properties, and describe the characteristic properties of the transition metals4Q&A pairs
- Describe how the Periodic Table is arranged into groups and periods and relate an element's position to its electron arrangement7Q&A pairs