Question on Catalysts in a Chemical Reaction

What does catalyst do to a reaction?

• Slows down the reaction

• Nothing changes

• Speeds up the reaction

Tags

NGSS.HS-PS1-5

What do you call the energy that is required to start a reaction?

• Alternative energy

• Activation energy

• Atmospheric energy

Which of the reaction pathway shows the catalysed reaction?

• 1

• 2

Tags

NGSS.HS-PS1-4

What happen to the rate of reaction when a catalyst is added to it?

• Increases

• Decreases

• Nothing changes

Tags

NGSS.HS-PS1-5

Catalysts may be in the state of ___________.

• Solid and liquid only

• Liquid and gases only

• Solid and gases only

• Solid, liquid or gases

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by making them more available

• by giving them more energy

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

• Red, because the activation energy is larger

• Blue, because the activation energy is lower

• both reaction progress at the same rate

Tags

NGSS.HS-PS1-4

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.

• catalyst

• reactant

• product

• solute

Tags

NGSS.HS-PS1-5

What is the name given to a catalyst in the human body?

• Saliva

• Lipid

• Enzyme

• Catalyst

Enzymes in your body probably work best at which of the following temperatures>

• 25^oC

• 37^oC

• 98^oC

• 100^oC