Reactivity 2
Paper 1 – MCQ
How many moles of carbon dioxide are produced by the complete combustion of
7.0 g of ethene, C2H4 (g)? (SL)
Mr = 28
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Which changes would increase the rate of an exothermic reaction? (SL)
What is the coefficient for H+ when the equation below is balanced? (HL)
__Pb (s) + __NO3− (aq) + __H+ (aq) → __Pb2+ (aq) + __NO (g) + __H2O (l)
A. 2
B. 4
C. 6
D. 8
What is the activation energy according to the following plot of the linear form of the
Arrhenius equation? (HL)
Arrhenius equation: k=Ae-Ea/RT.
A. Ea = (2×8.31) / (0.06)
B. Ea = (-2×8.31) / (0.06)
C. Ea = e(2×8.31) / (0.06)
D. Ea = e(-2×8.31) / (0.06)
The table shows data for the hydrolysis of a halogenoalkane, RCl.
Which statements are correct? (HL)
I. The reaction is first order with respect to RCl.
II. The reaction is second order overall.
III. The reaction proceeds by an SN2 mechanism.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at
the same temperature.
CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
Which reaction has the greatest rate? (SL)
A reaction proceeds by the following mechanism:
step 1: A+A→B
step 2: B+C→D
Which rate equation is consistent with this mechanism? (HL)
A. Rate = k[B]2[C]
B. Rate = k[A]2[B][C]
C. Rate = k[A]2
D. Rate = k[A][C]
What is the order with respect to each reactant? (HL)
2NO (g) + Cl2 (g) → 2NOCl (g)
What volume of carbon dioxide, CO2 (g), can be obtained by reacting 1 dm3 of
methane, CH4 (g), with 1 dm3 of oxygen, O2 (g)? (SL)
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l)
A. 0.5 dm3
B. 1 dm3
C. 2 dm3
D. 6 dm3
0.10 mol of hydrochloric acid is mixed with 0.10 mol of calcium carbonate.
2HCl (aq) + CaCO3 (s) → CaCl2 (aq) + H2O (l) + CO2 (g)
Which is correct? (SL)
What is the sum of the coefficients when the equation is balanced with whole
numbers? (SL)
__Sn(OH)4 (aq) + __NaOH (aq) → __Na2SnO3 (aq) + __H2O (l)
A. 4
B. 5
C. 6
D. 7
(SL)
(SL)
The exothermic reaction I2 (g) + 3Cl2 (g) ⇌ 2ICl3 (g) is at equilibrium in a fixed volume.
What is correct about the reaction quotient, Q, and shift in position of equilibrium the
instant temperature is raised? (SL)
A. Q > K, equilibrium shifts right towards products.
B. Q > K, equilibrium shifts left towards reactants.
C. Q < K, equilibrium shifts right towards products.
D. Q < K, equilibrium shifts left towards reactants.
(SL)
The equilibrium 2H2 (g) + N2 (g) ⇌ N2H4 (g) has an equilibrium constant, K, at 150 °C.
What is the equilibrium constant at 150 °C, for the reverse reaction? (SL)
N2H4 (g) ⇌ 2H2 (g) + N2 (g)
A. K
B. K−1
C. −K
D. 2K
What happens when the temperature of the following equilibrium system is increased?
CO(g) + 2H2(g)
CH3OH(g)
ΔHθ = -91Kj (SL)
Consider the equilibrium between N2O4(g) and NO2(g).
N2O4(g) ⇌⇌ 2NO2(g)
ΔH = +58 kJmol−1
Which changes shift the position of equilibrium to the right? (SL)
I.Increasing the temperature
II.Decreasing the pressure
III.Adding a catalyst
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
(SL)
Paper 2 – Extended Response
1.
2.
3.
4.
5.
6.
7.
Key answers
1. B
2. A
3. D
4. A
5. D
6. A
7. C
8. C
9. A
10. C
11. D
12. D
13. D
14. B
15. D
16. B
17. A
18. A
19. A
20. D
Paper 2
1.
2.
3.
4.
5.
6.
7.