Chemistry Test (04/12/24)

Which of the following is an example of a neutralization reaction?

• HCl + NaOH → NaCl + H₂O

• 2H₂ + O₂ → 2H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• CaCO₃ → CaO + CO₂

What is the purpose of a catalyst in a reaction?

• Increase activation energy

• Lower activation energy

• Increase reactant energy

• Change the products formed

Which process involves both oxidation and reduction?

• Combustion

• Neutralization

• Displacement

• Precipitation

Write a balanced equation for the combustion of propane (C₃H₈).

Explain how a powder reacts faster than a solid block of the same substance.

What is an exothermic reaction? Give an example.

Which is the correct molecular formula for an alkene with 4 carbon atoms?

• C₄H₁₀

• C₄H₈

• C₄H₆

• C₄H₄

What is the main product when ethene reacts with bromine?

• Ethanol

• Dibromoethane

• Ethane

• Polyethene

Which fraction of crude oil is used as fuel for cars?

• Kerosene

• Gasoline

• Diesel

• Bitumen

Write the balanced chemical equation for the fermentation of glucose to form ethanol.