Concentration and rate — Question Bank (Cambridge) — Cambridge IGCSE Biology 0610 Revision Notes & Topical Questions

Cambridge Lower Secondary Stage 9

Question 1
Paper Ref: 0620/23_Winter_2012_Q15

Which change does not increase the speed of reaction between zinc and hydrochloric acid?
adding a catalyst
B_ decreasing the particle size of the zinc
C decreasing the temperature
D using more concentrated acid

Options:
A
B
C
D
Correct Key: C

Question 2
Paper Ref: 0620/22_Winter_2009_Q17

Which change does not increase the speed of reaction between zinc and hydrochloric
acid?
A adding a catalyst
B_ decreasing the temperature
C decreasing the particle size of the zinc
D
using more concentrated acid

Options:
A
B
C
D
Correct Key: B

Question 3
Paper Ref: 0620/22_Summer_2009_Q18

Which does not increase the speed of a reaction?
oo BD
adding a catalyst
increasing the concentration of one of the reactants
increasing the particle size of one of the reactants
increasing the temperature

Options:
A
B
C
D
Correct Key: C

Question 4
Paper Ref: 0620/22_Summer_2020_Q34

One of the reactions used in the manufacture of sulfuric acid is shown.
250, + O₂ = 2503
Which catalyst is used to increase the rate of this reaction?
A
B
C
D
iron
manganese(IV) oxide
vanadium(V) oxide
nickel

Options:
A
B
C
D
Correct Key: C

Question 5
Paper Ref: 0620/22_Summer_2012_Q12

The rates of some chemical reactions can be measured by using the apparatus shown.
reactants
balance
For which reaction is this apparatus suitable?
A
B
c
D
MgCO, + 2HCI > MgCl, + COz + H,0
Mg + ZnCl, > MgCl, + Zn
MgCl, + 2NaOH —> Mg(OH). + 2NaCi
MgO + 2HCI > MgCl, + H,0

Options:
A
B
C
D
Correct Key: A

Question 6
Paper Ref: 0620/23_Summer_2024_Q17

The equation for the decomposition of hydrogen peroxide, H,O.,, is shown.
2H,0, — 2H,0 + O,
In an experiment, the total volume of oxygen produced is 100 cm’.
The experiment is repeated using 1.00g of a solid catalyst. All other conditions remain the same.
Which row describes the total volume of oxygen and the mass of the catalyst at the end of the
second experiment?
total volume of oxygen mass of catalyst
fom? /g
more than 100 less than 1.00
100 less than 1.00
100 1.00
more than 100 1.00

Options:
A
B
C
D
Correct Key: C

Question 7
Paper Ref: 0620/22_Winter_2014_Q16

The rate of a reaction depends on temperature, concentration, particle size and catalysts.
Which statement is not correct?
A Catalysts can be used to increase the rate of reaction.
B_ Higher concentration decreases the rate of reaction.
C Higher temperature increases the rate of reaction.
D
Larger particle size decreases the rate of reaction.

Options:
A
B
C
D
Correct Key: B

Question 8
Paper Ref: 0620/23_Summer_2011_Q15

A student investigates the rate of reaction between magnesium and excess sulfuric acid.
The volume of hydrogen given off in the reaction is measured over time.
The graph shows the results of two experiments, R and S.
volume of
hydrogen
given off
time
Which change in conditions would cause the difference between R and S?
A catalyst is added in S.
B_ The acid is more concentrated in R than in S.
C The magnesium is less finely powdered in R than in S.
D_ The temperature in R is lower than in S.

Options:
A
B
C
D
Correct Key: B

Question 9
Paper Ref: 0620/23_Summer_2014_Q17

In separate experiments, a catalyst is added to a reaction mixture and the temperature of the
mixture is decreased.
What are the effects of these changes on the rate of the reaction?
catalyst temperature
added decreased
A faster faster
B faster slower
Cc slower faster
D slower slower

Options:
A
B
C
D
Correct Key: B