Reaction Types_Y9

What happens in a combustion reaction?

• A substance reacts with oxygen to release energy (heat and light).

• A substance absorbs energy from the surroundings.

• A substance decomposes into simpler substances.

• A substance combines with another to form a new compound.

What are fossil fuels?

• Coal, oil, and natural gas formed from ancient plants and animals.

• Renewable energy sources like wind and solar power.

• Minerals extracted from the earth's crust.

• Biomass derived from living organisms.

What do fossil fuels mainly contain?

• Hydrocarbons.

• Oxygen and Nitrogen.

• Carbon Dioxide.

• Water and Minerals.

What is a neutralisation reaction?

• A reaction where an acid reacts with a base to form salt and water.

• A reaction that produces gas and heat without any liquid formation.

• A reaction that involves the combination of two acids to form a stronger acid.

• A reaction that occurs when a base reacts with a metal to produce hydrogen gas.

What is the chemical equation for respiration?

• C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy

• C₆H₁₂O₆ + 3O₂ → 3CO₂ + 3H₂O + energy

• C₆H₁₂O₆ + 2O₂ → 2CO₂ + 2H₂O + energy

• C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + 2 energy

What is the chemical formula for hydrochloric acid?

• HCl

• H2SO4

• NaCl

• CH3COOH

What is respiration?

• Process by which cells release energy from glucose and oxygen.

• Process of inhaling and exhaling air only.

• Conversion of sunlight into chemical energy.

• Breakdown of food without oxygen.

Write a balanced chemical equation for the incomplete combustion of methane.

• CH₄ + O₂ → CO + 2H₂O

• 2CH₄ + 3O₂ → 2CO + 4H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• 2CH₄ + O₂ → 2CO₂ + 2H₂O

What happens when acids react with metals?

• They produce salt and hydrogen gas.

• They produce water and carbon dioxide.

• They produce only hydrogen gas.

• They produce metal oxides.

What is the mitochondria?

• Organelle where respiration occurs to release energy (ATP) for the cell.

• A type of protein found in the cell membrane.

• A structure that stores genetic information.

• An organelle responsible for photosynthesis.