Quiz
AQA (9-1) Topic 6
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Fragen in diesem Quiz (11)
1Which of the following statements is true about chemical reactions?
- ACatalysts increase the amount of product formed
- BLarge quantities of catalyst are needed
- CCatalysts are always used up during a reaction
- DCatalysts increase the rate of reaction
2Select the correct statement about how the rate changes during the reaction.
- Ait increases, then decreases to zero
- Bit decreases to zero
- Cit stays the same
- Dit increases from zero
3Select all the factors that can change the rate of reaction. (hint: there's more than one)
- Acatalysts
- Btemperature
- Csurface area
- Dpressure
- Econcentration
- Fsize of container
- Gheight
- Hvolume
4Using data from the table, when did the reaction stop?
[blank_start]80[blank_end] seconds.
- A80
- B0
- C20
- D40
- E60
- F100
5Using data from the table, what was the mean rate of reaction?
[blank_start]0.5[blank_end] cm3/s- A0.5
6Which line represents the fastest overall reaction?
- AA
- BB
- CC
7The activation energy for a reaction was measured with and without a catalyst. Select the value below that was the value for the catalysed reaction.
- A72 kJ/mol
- B55 kJ/mol
8Increasing the [blank_start]surface area[blank_end] of reactants frees up more particles that are available to [blank_start]collide[blank_end] right away. This doesn't add more particles in to the reaction, it only allows particles that would have once had to wait for other particles to react first to be available. This leads to more [blank_start]frequent[blank_end], successful collisions and so the rate of reaction [blank_start]increases[blank_end].
- Asurface area
- Bcollide
- Cfrequent
- Dincreases
9There are three main ways to measure the rate of a reaction:
- Athe change of mass of reactants over time
- Bthe volume of gas produced over time
- Cthe time taken for a solution to change colour, or form a precipitate
- Dthe change in volume of reactants over time
- Ethe mass of gas produced over time
- Fthe time taken for a solution to form
10Equilibrium is reached when the forward and reverse reactions occur at similar rates.
- ARichtig
- BFalsch
11The concentrations of the reactants vs products are not necessarily equal at equilibrium, and there is usually more of one than the other.
If the concentration of the reactants is higher than products, we say the equilibrium lies to the [blank_start]left[blank_end].
If the concentration of the products is higher than the reactants, we say the equilibrium lies to the [blank_start]right[blank_end].- Aleft
- Bmiddle
- Cright
- Dright
- Emiddle
- Fleft
Informationen
- Beschreibung
- GCSE Chemistry (AQA) Quiz am AQA (9-1) Topic 6, erstellt von https:// revisechemistry.uk am 01/03/2018.
- Sprache
- English
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