Q5 - Rate of Chemical Reaction
Quiz by Shynne Izza Clemente
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- Q1
Which of the following statements best describes the rate of a chemical reaction?
It is the pressure exerted by the reactants during the process of chemical reaction.
It is the speed in which the reactants are converted into a product.
It is the amount of temperature needed to start a chemical reaction.
It is the volume in which the reactant particles can occupy.
300s - Q2
A chemical change that occurs when two or more substances combine to form a new substance.
Chemical Reaction
Product
Activation Energy
Chemical Kinetics
300s - Q3
Catalysts generally react with one or more of the reactants to form a structure, which then reacts to form the final product. What do you call this structure?
activated catalyst
activated reactants
activated products
activated complex
300s - Q4
Which of the following best describes a catalyst?
Adds to the concentration of the reactants in a chemical reaction.
Increases the activation energy of reacting particles.
Speeds up the process of a chemical reaction, without being consumed.
Increases the temperature of reacting particles in chemical reaction.
300s - Q5
Which of the following conditions would speed up a reaction?
Increasing the concentration of reactants
Decreasing the temperature
Using lumps instead of powder
The mixture is not stirred
300s - Q6
Which of the following is NOT a key concept of the collision theory?
particles must move slowly when they collide, otherwise the simply bounce off one another
particles must collide in order to react
particles must collide with proper orientation
particles must collide with sufficient energy known as the activation energy
300s - Q7
Which of the following does NOT affect the rate of a chemical reaction?
Concentration
Temperature
Catalyst
Humidity
300s - Q8
The rate of a chemical reaction normally
increases as reactant concentration decreases
increases as the surface area increases
decreases as the temperature increases
decreases when a catalyst is added
300s - Q9
Crushing a solid into a powder will increase the rate of reaction because:
the activation energy will be lowered
the particles will collide with more energy
the powdered form has more surface area
the orientation of colliding particles will be improved
300s - Q10
In general, as temperature increases, the rate of a chemical reaction
decreases due to fewer collisions with proper molecular orientation
increases due to an increase in the activation energy
remains unchanged
decreases due to a greater number of effective collisions
300s - Q11
True or False. If the reactant particles collide with less than the activation energy, the particles bounce back and no reaction will occur.
truefalseTrue or False300s - Q12
Catalysts permit reactions to proceed along a ___________energy path.
lower
higher
none of these
restricted
300s - Q13
How is catalyst different from a reactant?
Adding more catalyst slows down the rate of reaction.
The catalyst is not used up in the reaction.
The catalyst increases the activation energy of the reaction.
Adding more catalyst speeds up the rate of reaction.
300s - Q14
If you used a gaseous reactant and a solid catalyst, this means the catalyst you used is a ___________.
Users enter free textType an Answer300s - Q15
___________ collisions are collision of particles that result into a chemical reaction.
Users enter free textType an Answer300s