Reaction

What name is given to the minimum amount of energy needed by particles for them to react when they collide?

• Activation energy

• Catalytic energy

• Threshold energy

Which of the following is a possible unit for rate of reaction?

• cm³/s

• m/s

• N

Tags

NGSS.HS-PS1-5

Which of the following would speed up a reaction?

• Using lumps instead of powder

• Increasing the concentration of an acid

• Decreasing the temperature

Tags

NGSS.HS-PS1-5

What is the effect of decreasing the pressure on the following equilibrium 2NO(g) + O₂(g) ⇌ 2NO₂(g)?

• Less NO₂ will be produced

• Less NO and O₂ is formed

• No change will occur

Tags

NGSS.HS-PS1-5

What type of reaction involves the breaking down of a substance into simpler substances?

• Single Displacement Reaction

• Double Displacement Reaction

• Synthesis Reaction

• Decomposition Reaction

Tags

NGSS.MS-PS1-2

Which of the following is a decomposition reaction?

What is the name of the model which is used to explain how different factors affect the rate of a reaction?

• Particle theory

• Big Bang theory

• Collision theory

Tags

NGSS.HS-PS1-5

What piece of apparatus could be used to measure the volume of gas produced in a reaction

• Gas syringe

• Beaker

• Top pan balance

Which of the following will increase the frequency of successful collisions?

• Increasing the temperature

• Decreasing the pressure

• Decreasing the concentration

Tags

NGSS.HS-PS1-5

Which of the following statements about catalysts is false?

• They speed up reactions

• They provide an alternative reaction pathway with a lower activation energy

• They become chemically changed at the end of the reaction

Tags

NGSS.HS-PS1-5