1 The bond present in benzene between carbon atoms is: A Only single B Only double C Delocalized D Only triple
2 What does the PASS method stand for when using a fire extinguisher? A Pull, Aim, Squeeze, Sweep B Push, Aim, Spray, Stop C Pull, Alert, Spray, Secure D Point, Aim, Shoot, Sweep
3 What does the radiation hazard symbol warn about? A Presence of radioactive materials B Presence of toxic gases C Presence of flammable liquids D Presence of corrosive acids
5 What does the PASS method stand for in fire extinguisher use? A Pull, Aim, Squeeze, Sweep B Push, Aim, Spray, Stop C Pull, Aim, Spray, Sweep D Point, Aim, Squeeze, Stop
6 Which layer of the atmosphere contains the ozone layer that protects us from harmful UV rays? A Troposphere B Mesosphere C Stratosphere D Thermosphere
7 What is the product when sodium reacts with water? A Sodium oxide and hydrogen B Sodium hydroxide and hydrogen C Sodium chloride and oxygen D Sodium hydride and oxygen
8 Which of the following best explains why significant figures are used in measurements? A To show the uncertainty in the last digit B To make numbers look longer C To hide errors in measurement D To change the unit of the measurement
9 A measurement that is both accurate and precise is: A Close to the true value and to other readings B Close to the true value but not to other readings C Close to other readings but not to the true value D Far from both the true value and other readings
10 Which gas is produced by the incomplete combustion of fossil fuels and is poisonous? A Carbon dioxide B Carbon monoxide C Sulphur dioxide D Nitrogen
11 Which of the following is a particulate air pollutant? A Carbon dioxide B Sulphur dioxide C Dust D Nitrogen
12 Which environmental issue is caused by the increase of greenhouse gases? A Acid rain B Global warming C Ozone hole D Smog
14 Which of the following is a structural isomer of butane (C4H10)? A 2-methylpropane B 2-methylbutane C Propane D Pentane
15 The tendency of an atom to attract shared electrons in a chemical bond is called: A Ionization energy B Electronegativity C Electron affinity D Atomic radius
17 Which air pollutant is mainly produced by incomplete combustion of fossil fuels? A Carbon dioxide B Carbon monoxide C Sulphur dioxide D Ozone
18 Which type of fire extinguisher is most suitable for putting out a fire caused by flammable liquids such as petrol? A Water extinguisher B Foam extinguisher C Carbon dioxide extinguisher D Sand bucket only
20 Why is it important to calibrate a thermometer before use? A To make it look new B To ensure accurate readings C To change its scale D To increase its range
23 The tendency of an atom to attract a shared pair of electrons towards itself is called: A Ionisation energy B Electron affinity C Electronegativity D Atomic radius
24 Which personal protective equipment (PPE) is most important to wear when handling corrosive chemicals in the laboratory? A Lab coat B Safety goggles and gloves C Closed shoes D Face mask