Q.1
________ is the measure of how much area of anobject is exposed.
  • Surface Area
  • Catalyst
  • Temperature
  • Concentration
Q.2
Grains of sugar have a greater _______ than a solid cube ofsugar of the same mass, and therefore will dissolve quicker in water.
  • Surface Area
  • Catalyst
  • Temperature
  • Concentratrion
Q.3
Which among the following is NOT TRUE about the collision theory and the rate of reaction?
  • higher temperature ---> faster particle movements ---> more collision
  • higher concentration ---> more spaces between particles ---> more collision
  • higher surface area ---> more particle interactions ---> more collision
Q.4
Which of the following is/are the fundamental idea(s) of collision theory?
  • Molecules react by colliding together
  • The effective collisions must occur with certain minimum amounts of energy
  • In a large sample, the greater the number of effective collisions, and the faster the rate of reaction
  • All of the above
Q.5
What criteria must be met for reactant collisions to result in a successful product?
  • The reactants must collide with each other
  • The reactants must collide with enough energy and be in the right positions
  • The reactants must have enough energy to form the activated complex
Q.6
Which of the following will lower the rateof reaction?
  • adding an enzyme to the reaction
  • decreasing the temperature from 40°C to10°C
  • breaking a chunk of calcium up intosmaller pieces
  • increasing the amount of solutedissolved in a solution
Q.7
In an endothermic reaction, heat is ...
  • taken in
  • given out
Q.8
Which process has the highest rate of reaction?
  • Rusting
  • Respiration
  • Combustion
  • Photosynthesis
Q.9
What is the meaning of the rate of reaction?
  • Decrease in amount of product
  • Decrease in amount of product against time
  • Increase in amount of products against time
  • Increase in amount of reactants against time
Q.10
Products will form faster if____________
  • the particle size of the reactants are larger.
  • temperature is decreased.
  • concentration of the reactants are increased.
  • the reaction is not stirred.
Q.11
The rate of a chemical reaction is NOT affected by which of the following:
  • temperature
  • concentration
  • particle size (surface area)
  • All of these affect reaction rates
Q.12
The rate of a reaction is how _____________ a reaction occurs.
  • Quickly
  • Easily
  • Unusually
  • Differently
Q.13
Substance that changes the rate of a chemical reaction without being consumed in the reaction
  • bonding
  • catalyst
  • chemical reaction
  • activation energy
Q.14
Adding a catalyst ___________ the activation energy.
  • Raises
  • Lowers
  • Doesn't affect
  • Inreases
Q.15
As the frequency of ______________ increases, the rate of reaction increases.
  • Time
  • Reactions
  • Collisions
  • Reactants
Q.16
Increasing the temperature gives particles more __________.
  • Time
  • Energy
  • Space
  • Frequency
Q.17
Grinding a effervescent tablet into powder increases the rate of reaction due to increased
  • concentration
  • surface area
  • temperature
  • reactants
Q.18
Why does a higher temperature increase the rate of a reaction?
  • it increases both the frequency and energy of particle collisions
  • it only increases the frequency of particle collisions
  • it only increases the energy of particle collisions
  • it reduces the activation energy of the reaction
Q.19
A temperature increase causes the particles to ......
  • to slow down
  • move faster
  • collide higher
  • in the right order
Q.20
Increase in temperature causes the particles to
  • slow down
  • move faster
  • stay apart from each other
  • move in the correct order
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