1 Which of the following is an element? flag bookmark A Ammonia B Naphthalene C Butanol D Oxygen T4 Chapter 2.1 Basic Concepts of Matter Oxygen is an element because it is made of only one type of atom. Ammonia, naphthalene and butanol are compounds made of two or more elements.
2 What is the name of Group 1 of the Periodic Table of Elements? flag bookmark A Alkaline earth metals B Alkali metals C Halogens D Noble gases T4 Chapter 4.4 Elements in Group 1 Group 1 elements such as lithium, sodium and potassium are called alkali metals. Group 2 are alkaline earth metals, Group 17 halogens and Group 18 noble gases.
3 Which of the following is a synthetic polymer? flag bookmark A Nylon B Glucose C Rubber T5 Chapter 4.1 Polymer Nylon is a man-made (synthetic) polymer. Glucose is a monomer, not a polymer, and rubber from latex is a natural polymer.
4 What substance is produced when ethanol burns in excess oxygen? flag bookmark A Carbon dioxide and carbon monoxide B Carbon dioxide, carbon monoxide and water C Carbon dioxide and water T5 Chapter 2.3 Chemical Properties and Interconversion of Compounds Between Homologous Series In excess oxygen, ethanol burns completely to form only carbon dioxide and water. Carbon monoxide forms only when oxygen is limited.
5 Diagram 1 shows the arrangement of particles in an alloy. What is the alloy shown in Diagram 1? flag bookmark A Steel B Brass C Duralumin D Stainless steel T4 Chapter 8.1 Alloy and Its Importance The diagram shows iron atoms with a few carbon atoms between them, which is steel. Stainless steel also contains chromium and nickel.
6 Diagram 2 shows how a chemical bond is formed. Which of the following statements most accurately defines the chemical bond shown in Diagram 2? flag bookmark A Bonds are formed through the transfer of valence electrons between molecules and positively charged ions. B The bond formed is a covalent bond in which the shared electron pair comes from only one atom. C The chemical bond formed when a hydrogen atom is attracted to a more electronegative atom. D The chemical bond formed when a hydrogen ion donates valence electrons to a water molecule. T4 Chapter 5.5 Dative Bond H₂O gives a lone pair of electrons to H⁺ to form H₃O⁺. Both shared electrons come from the oxygen atom, so it is a dative (coordinate) covalent bond.
7 Diagram 3 shows the medicine envelope supplied by the doctor to Mr. Ahmad. Based on the instruction given on the medicine envelope, what type of medicine was given to Mr. Ahmad? flag bookmark A Antimicrobials B Anti-allergies C Analgesics D Corticosteroids T5 Chapter 5.4 Medicines and Cosmetics The envelope says the medicine must be finished completely. That is the instruction for antimicrobials such as antibiotics, so that all the bacteria are killed and resistance does not develop.
8 Which of the following substances is a liquid at 100 °C? | Substance | Melting point (°C) | Boiling point (°C) | |---|---|---| | P | −157 | −9 | | Q | −13 | 55 | | R | 80 | 196 | | S | 110 | 200 | flag bookmark A P B Q C R D S T4 Chapter 2.1 Basic Concepts of Matter A substance is a liquid at 100 °C when its melting point is below 100 °C and its boiling point is above it. R melts at 80 °C and boils at 196 °C.
9 Which of the following is a weak acid? flag bookmark A Nitric acid B Ethanoic acid C Sulphuric acid D Hydrochloric acid T4 Chapter 6.3 Strength of Acids and Alkalis Ethanoic acid ionises only partially in water, so it is a weak acid. Nitric, sulphuric and hydrochloric acids ionise completely and are strong acids.
10 Diagram 4 shows the arrangement of the apparatus used to find the empirical formula of a metal oxide. What are substances X, Y and Z? flag bookmark A Substance X: Sodium; Substance Y: Water; Substance Z: Hydrochloric acid B Substance X: Zinc; Substance Y: Hydrochloric acid; Substance Z: Water C Substance X: Copper; Substance Y: Nitric acid; Substance Z: Sodium hydroxide D Substance X: Lead; Substance Y: Ethanoic acid; Substance Z: Water T4 Chapter 3.3 Chemical Formula Hydrogen gas is made from zinc (X) and hydrochloric acid (Y) and passed over the heated metal oxide to reduce it. Water (Z) collects the excess gas.