Grade 12 Multiple Choice CPT
1. The hybridization of carbon atoms in alkanes is
(a) sp
(b) sp2
(c) sp3
(d) sp3d
(e) sp3d2
2. A molecule with the formula C3H8 is a(n):
(a) hexane
(b) propane
(c) decane
(d) butane
(e) ethane
3. Select the correct IUPAC name for:
(a) 1,4-dimethylcyclopentane
(b) 1,3-dimethylcyclopentane
(c) 2,5-dimethylcyclopentane
(d) 2,3-dimethylcyclopentane
(e) 2,4-dimethylcyclopentane
4. The functional group given below is characteristic of organic _____ .
(a) ketones
(b) acids
(c) aldehydes
(d) esters
(e) alcohols
5. Which of the following isn’t a truth about quantum mechanics?
a. Physicists are at a consensus about an interpretation of Quantum
Mechanics.
b. An electron can seem to interfere with itself when passing through
double slits.
c. Energy is quantized.
d. Momentum is quantized
e. A particle has a chance to be found in a region which should
classically be impossible for it to be found in.
6. Rutherford’s experiments into the atom suggested that...
a. Atoms were largely made up of empty space
b. Atoms had a small, dense nucleus
c. Electrons orbited the nucleus
d. All of the abov
7. Substances which are made up of more than one type of atom chemically
bonded together are known as:
a. Elements and molecules
b. Compounds and molecules
c. Compounds and elements
d. Atoms and compounds
8. The ionization energy of an element:
a. is the energy needed to move an electron from the first energy level to
the second one
b. is the energy generate
c. by its nucleus
d. cannot be calculated or observed
e. is the energy needed to detach an electron from an elemental atom
9. What is the correct order of the atomic radius in the elements below?
a. Cl > Al > Mg
b. Mg > Al > Cl
c. Al < Mg < Cl
d. Mg < Al < Cl
e. Mg < Al > C
10.Which statement concerning the Law of Conservation of Energy is not true?
a. it applies to all chemical changes
b. it involves all different forms of energy
c. it applies to nuclear reactions
d. it includes potential energy
e. it involves heat content of substances
11.What is another way to write the following equation?
C2H6(g) → C2H2(g) + 2H2(g) ΔH = 3.2 × 102 kJ/mol
a. C2H6(g) → C2H6(g) + 2H2(g) + 3.2 × 102 kJ
b. C2H6(g) + 3.2 × 102 kJ → C2H2(g) + 2H2(g)
c. 2H2(g) + C2H2(g) + 3.2 × 102 kJ → C2H6(g)
d. C2H6(g) – 3.2 × 102 kJ → C2H2(g) + 2H2(g)
e. none of the above
12. Consider the following four equations:
1.
C6H6(l) + 15/2 O2(g) → 6CO2(g) + 3H2O(l) )H1
2.
H2(g) + 1/2 O2(g) → H2O(l) ΔH2
3.
C(s) + O2(g) → CO2(g) ΔH3
4.
6C(s) + 3H2(g) → C6H6(l) ΔH4
13. The enthalpy change for reaction 1, ΔH1 can be obtained by combining the
ΔH's for the other reactions in which of the following ways?
a. 6(ΔH3) + 3(ΔH2) + ΔH4 d. 6(ΔH3) + 3(ΔH2) – ΔH4
b. 6(ΔH3) – 3(ΔH2) + ΔH4 e. none of the above
c. 6(ΔH3) – 3(ΔH2) + ΔH4
14. NaCl(s) + H2O(l) → NaCl(aq) ΔH = +1.67 kJ/mol of NaCl (at 298 K)
If sufficient NaCl is dissolved in water to form 1.00 L of 2.00 mol/L NaCl
solution, the change in enthalpy of the system will be
a. 1.67 kJ d. 2.50 kJ
b. 3.34 kJ e. none of the above
c. 8.35 kJ
15. Using the standard heats of formation, what is the enthalpy change per mole of
CO2 for the following reaction?
CO(g) + 1/2 O2(g) → CO2(g)
a. –506 kJ d. +506 kJ
b. –284 kJ e. –617 kJ
c. +284 kJ
16. Based on the heat of formation of MgO, how much energy is required to
decompose 48.6 g of MgO?
a. 603 kJ d. 60.3 kJ
b. 725 kJ e. 1504 kJ
c. 301 kJ
17. Which of the following equations represents the correct heat of formation of
water vapour?
a. H2(g) + 1/2 O2(g) → H2O(l) d. H2(g) + O2(g) → 2H2O(g)
b. H2(g) + O(g) → H2O(g)
c. 2H(g) + O(g) → H2O(g)
e. H2(g) + 1/2 O2(g) → H2O(g)
18. What property would be appropriate to measure the reaction rate in the
following reaction:
?
a. change in conductivity d. change in pressure
b. change in mass
e. change in volume
c. change in colour
19. Which of the following factors do not affect the position of the equilibrium?
a) Changing the volume
b) Changing the pressure
c) Changing the temperature
d) Adding a catalyst
e) Adding more reactants
20. A galvanic cell is
a) a chemical system that produces an electric current through a spontaneous redox
reaction.
b) a chemical system that uses an electric current to drive a non-spontaneous redox
reaction.
c) a flow of electrons in a circuit (= electrochemistry)
d) a chemical system is which a solute conducts a current in an aqueous solution (
= electrolyte)
e) a chemical system in which a compound breaks down into elements or simpler
compounds ( = decomposition reaction)
21. In both a galvanic cell and an electrolytic cell,
a.
Reduction occurs at the cathode
b.
The cell potential is positive
c.
The overall reaction is spontaneous
d.
An external voltage is required
e.
Chemical energy is converted to electrical energy
22. Which of the following reactions is NOT a redox reaction?
a.
Na + Cl --->NaCl
b.
H2O2 --> HO2 + H+
c.
Ni2+ + Fe ---> Fe2+ + Ni
d.
NaOH + HCl --->NaCl + H2O
23. Which of the following terms best describes CH4 in the following reaction?
a.
b.
c.
d.
oxidized
oxidizing agent
hydrolyzed
reduced
27. Which half-reaction takes place at the anode?
a.
The one with the greater reduction potential
b.
The one that transfers the most number of electrons
c.
The reduction
d.
The oxidation