@Which one of the following would NOT increase the rate of a chemical reaction?
Decreasing the concentrations
Increasing the temperature
Using a catalyst

@The reaction between powdered magnesium and dilute sulphuric acid can be sped up by:
Warming the mixture
Adding water
Using acid that is more dilute

@Increasing the pressure would increase which one of the following reactions reaction rates?
N + 3H  2NH
NHCl  NH + HCl
CaCO  CaO + CO

@When added to dilute hydrochloric acid, 1g of magnesium powder reacts more quickly than 1g of magnesium ribbon because:
Magnesium powder has a larger surface area
Magnesium ribbon becomes coated in an oxide
Magnesium powder has less impurities

@Hydrogen peroxide decomposes with copper II oxide as a catalyst. At the end of the reaction the:
mass of the copper II oxide is the same
hydrogen peroxide is unchanged
copper II oxide has totally reacted to form a new product

@What does a catalyst do?
Speeds up a reaction, but is chemically unchanged at the end
Decreases the temperature of the reacting mixture
Produces more of the product

@In the contact process, SO and O are reacted together to form SO. This process is sped up by using:
Vanadium pentoxide as a catalyst
Very high temperatures
Air rather than pure oxygen

@Magnesium reacts quickest with water when you use
Magnesium powder and steam
Magnesium ribbon and steam
Warm water and magnesium ribbon

@If you had one 10g lump of a substance, and ten 1g lumps of the same substance then:
The ten 1g lumps would react faster
The one 10g lump would react faster
There would be no difference in the reaction rates

@The law of conservation of matter says
During a reaction matter can't be created or destroyed
At the end of a reaction the catalyst is  physically unchanged
During a reaction the temperature must remain constant

@The graph labelled x shows the amount of product produced during a chemical reaction. Which of the other graphs shows the same experiment, but this time using a catalyst?
#rrate_1
Graph z
Graph y
Graph w

@The graphs show the amount of product produced against time for 4 chemical reactions. Which produced the MOST product?
#rrate_1
Reaction y
Reaction w
Reaction z

@The graph shows the amount of product produced against time for 4 chemical reactions. Reactions z and x show:
#rrate_1
The amount of product is the same, but reaction z is faster
Reaction z produces more product than x
Reaction x takes place at lower temperature than reaction z

@Which will react faster with an acid - one 4g lump of marble, or four 1g lumps?
#area
Four 1g lumps
One 4g lump
They will both react at the same rate because they are both made of the same substance

@In a chemical reaction which will react more slowly one 4g lump of four 1g lumps?
#area
One 4g lump
Four 1g lumps
They will both react at the same rate

@In an expeiment it was found that four 1g lumps reacted faster than a single 4g lump. This was because:
#area
The surface area with the four 1g lumps was larger
The 1g lumps were more free to move around
Four 1g lumps are more concentrated than a single 4g lump

@Two test tubes contain sulphuric acid. In tube X is magnesium powder and in tube Y are small pieces of magnesium. Both contain the same amount. Which statement is correct?
#ttube
Tube X will react more quickly than Y
Tubes X and Y will react at exactly the same rate
Tube Y will react quicker than X

@Magnesium in tube Y is reacting more slowly than in tube X. To speed up tube Y you could:
#ttube
Heat test tube Y a little
Shake tube Y
Add more acid (blue liquid)

@The diagram shows the volume of gas collected as marble chips react with an acid. The rate of reaction is greatest at:
#graph2
Point 1
Point 2
Point 3

@The graph shows rate of a chemical reaction over a period of time. The curved graph shows:
#graph
the rate of reaction slows down as time goes on
the rate of reaction remains constant
the reaction rate gradually increases