Chemistry All Around Us

What this quiz asks

• What is the chemical formula for water?
• A fire needs heat, fuel and which third ingredient?
• The green colour of this famous statue comes from a weathered layer on which metal?
• Household bleach and ammonia-based cleaners should never be mixed.
• Which acid does your stomach produce to help digest food?
• What colour does blue litmus paper turn when dipped in an acid?
• Select ALL of these that are physical changes rather than chemical ones.
• Is completely pure water a good conductor of electricity?
• Mothballs slowly shrink away in a wardrobe without ever melting. What is this solid-to-gas change called?
• When an antacid tablet calms heartburn, what kind of reaction is taking place?
• Which substance is added to most toothpastes to strengthen tooth enamel?
• Silver tarnishes mainly because it reacts with oxygen in the air.
• What is the main gas in the natural gas piped to homes for heating?
• Reusable 'click' hand warmers give off heat when the liquid inside turns into crystals.
• Hydrogen peroxide fizzes when poured on a cut. Which gas makes the bubbles?
• At normal air pressure, at what temperature does dry ice turn straight into gas?
• Select ALL of the products formed when candle wax burns completely.
• Order these from the most acidic to the most alkaline (lowest pH to highest).
• A car airbag inflates in a split second by filling with which gas?
• Which metal is used to give fireworks a deep red colour?