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YEAR 12 Chem

Total questions: 61

Worksheet time: 1hrs 2mins

Name
Class
Date
1.
2SO2(g)+O2(g)⇌2SO3(g)
Removing O2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
decrease temperature
d)
have no change
2.
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
increase rate of reaction
d)
have no change
3.

At elevated temperatures ammonium carbonate, NH2COONH4, is in equilibrium with NH3 and CO2 according to the equation;

NH2COONH4(s) ↔ 2 NH3(g) + CO2(g)

What is the equilibrium expression for this reaction?

a)

K = 2 [NH3][CO2]

[NH2COONH4]

b)

K = [NH3]2[CO2]

[NH2COONH4]

c)

K = 2 [NH3][CO2]

d)

K = [NH3]2[CO2]

4.
What is the equilibrium-constant expression for 
CO2(g) + H2(g) ↔ CO(g) + H2O(l)
a)
Kc= [CO][H2O] / [CO2][H2]  
b)
Kc= [CO2][H2] / [CO]
c)
Kc= [CO2][H2] / [CO][H2O]
d)
Kc= [CO] / [CO2][H2]  
5.
2SO2(g)+O2(g)⇌2SO3(g)
Decreasing volume of container will
a)
shift equilibrium right
b)
shift equilibrium left
c)
change K
d)
have no change
6.

Which compound is the conjugate acid? (Hint: Determine the base)

PO43- + HNO3 ==> NO3- + HPO42-

a)

PO43-

b)

HNO3

c)

NO3-

d)

HPO42-

7.

In the reaction below, H2O is a(n):

H2SO3 + H2O --> H3O+ + HSO3-

a)

base

b)

acid

c)

conjugate acid

d)

conjugate base

8.
HSO4- + H2O → H3O++ SO42-
Identify the Acid in the above reaction.
a)
HSO4-
b)
H2O
c)
H3O+
d)
SO42-
9.

KOH has a pOH of 3.0, what is the [OH-]?

a)

0.01 M

b)

0.001 M

c)

0.0001 M

d)

0.1 M

10.
What is the [OH-] if the [H+] is 1.0 x 10-3M?
a)
1.0 x 10-3 M
b)
6.02 x 10-23 M
c)
1.0 x 10-14 M
d)
1.0 x 10-11 M
11.

What is the pH of a 1.53 x 10-6 M solution of HCl?

a)

5.82

b)

8.18

c)

6.99

d)

4.15

12.
I have 25mL of 1M HCl which neutralises 20mL of NaOH. What is the concentration of the NaOH?
a)
0.8 M
b)
1 M
c)
1.25 M
13.
Identify the products of the chemical equation
3 LiOH + H3PO4 →
a)
Li3PO4 + 3 H2O
b)
LiPO4 + 3 H2O
c)
Li(PO4)3 + 3 H2O
d)
BOY + La + N2
14.
Which of the following is a conjugate acid/base pair?
a)
HCl/OCl-
b)
H2SO4/SO42-
c)
NH4+/NH3
d)
H3O+/OH-
15.
What is the endpoint of a titration
a)
Where the amount of acid and alkali are balanced according to the equation
b)
Where the colour changes
c)
At the end
16.

A titration can be used to determine the _______________ of a solution.

a)

Molarity

b)

Density

c)

Boiling point

d)

Reactivity

17.
Marine organisms make their shells from calcium and
a)
chloride
b)
carbonate
c)
seawater
18.

CO2 + H20 -->

a)

H2CO3

b)

CO3

c)

CO2

d)

H3O+

19.

In a Galvanic Cell, the anode is...

a)

positive

b)

negative

20.

In a Galvanic Cell, the cathode is...

a)

positive

b)

negative

21.

Oxidation occurs at the...

a)

anode

b)

cathode

22.

In a Galvanic cell, the electrons flow from the...

a)

anode to the cathode

b)

cathode to the anode

23.

Ecell =

a)

Ered - Eox

b)

Ered + Eox

c)

Eox - Ered

d)

Eox + Ered

24.

In the list of standard electrode potentials, the strongest reducing agent is...

a)

K

b)

K+

c)

F2

d)

F-

25.

In the list of standard electrode potentials, the strongest oxidising agent is...

a)

K

b)

K+

c)

F2

d)

F-

26.

In a redox reaction, the oxidising agent... (choose two options)

a)

is oxidised

b)

is reduced

c)

increases its oxidation number

d)

decreases its oxidation number

27.

In a Galvanic cell, the cations in the salt bridge...

a)

flow the same way as the electrons flow in the wire

b)

flow the opposite way to the electron flow in the wire

c)

stay in the salt bridge

28.

In a Galvanic Cell, the salt bridge...

a)

completes the circuit so that electrons can flow through the wire

b)

maintains charge balance

c)

is soaked in an unreactive electrolyte such as KNO3

d)

all of the above

29.

In the above Galvanic Cell, which half cell is undergoing reduction?

a)

Cu | Cu2+

b)

Zn | Zn2+

30.

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg

Which is the half-reaction occurring at the anode?

a)

HgO + 2 e- → Hg + O2-

b)

Zn2+ + 2 e- → Zn

c)

Zn → Zn2+ + 2 e-

d)

ZnO + 2 e- → Zn

31.

What is the standard electrode which all other standard electrode potentials are measured against?

a)

helium

b)

hydrogen

c)

magnesium

d)

potassium

32.

Select all the standard conditions used to measure the standard electrode potentials:

a)

electrolyte solution 1 moldm-3

b)

298K temperature

c)

all chemicals in gaseous form

d)

1atm pressure

e)

standard hydrogen electrode as comparison

33.

What two things cause Iron to Rust ?

a)

Air and Oxygen

b)

Oxygen and Water

c)

Water and Carbon dioxide

d)

Carbon dioxide and Air

34.

Rusting can be prevented by

a)

Alloying

b)

Tinning

c)

Galvanizing

d)

All of above

35.
To protect iron against corrosion, the most durable metal plating on it, is:
a)
Zinc plating
b)
Nickel plating
36.

Coating of Zn, Al and Cd on steel are _________ , because their electrode potentials are lower

a)

Cathodic

b)

Anodic

c)

Not affecting

d)

Expensive

37.

Which diagram shows the most favourable conditions for rust to appear on the nail?

a)

A

b)

B

c)

C

d)

D

38.

Galvanizing is a process of:

a)

Applying a Zinc coating to bare steel

b)

Washing the body with the phosphate coating

c)

dipping a body in E-COAT

d)

Chemically etching primer to steel

39.

What are the classification of polymer based on molecular forces

a)

Homomer, co-polymer

b)

Thermosetting, thermoplastic, elastomers

c)

Addition condensation

d)

Linear , branched, crosslinked

40.

What is the classification of polymer based on Polymerisation

a)

Linear,branched, crosslinked

b)

Addition, condensation

c)

Natural, synthetic

d)

Homomer, co-polymer

41.

In ------------ polymerization, two different monomers are involved with the elimination of small molecules.

a)

addition

b)

condensation

c)

copolymerization

d)

bulk

42.

A section of a polyester is shown in the diagram. Which two molecules (monomers) could be reacted to form this polymer?

a)

Dicarboxylic acid

b)

Dialcohol

c)

Alkene

d)

Ester

43.

Which two molecules (monomers) could be reacted to make a polyester?

a)
b)
c)
d)
44.

Amino acids react to form peptides and proteins, this process is known as

a)

addition polymerization

b)

substitution polymerization

c)

condensation polymerization

d)

hydration polymerization

45.

Monomers of ethene in thousand numbers react together in addition polymerization to produce

a)

polyamides

b)

polyesters

c)

poly(ethene)

d)

all of them

46.

Once formed, it can be heated and reformed over and over again

a)

thermoset

b)

thermoplastic

c)

elastomer

d)

kevlar

47.
Proteins are composed of what smaller subunits?
a)
amino acids
b)
nucleic acids
c)
fatty acids
d)
nucleotides
48.

Which of these is an example of synthetic polymer?

a)

cotton fibers

b)

rubber

c)

wool

d)

polyvinyl chloride (PVC)

49.
This image is an example of: 
a)
Nylon
b)
Polyester
c)
Polystyrene
d)
Polyvinyl chloride
50.

Which one of the following polymers is prepared by condensation polymerization?

a)

Teflon

b)

Rubber

c)

Styrene

d)

Nylon-6,6

51.

Based on its R group, one property of this amino acid is that it is...

a)

Nonpolar/hydrophobic

b)

Polar/hydrophillic

c)

Positve

d)

Negative

52.

Based on its R group, one property of this amino acid is that it is...

a)

Nonpolar/hydrophobic

b)

Polar/hydrophillic

c)

Positve

d)

Negative

53.

What type of bond is a peptide bond?

a)

Ionic

b)

Covalent

c)

Hydrogen

d)

Van der Waals

54.
What is the monomer of a protein?
a)
amino acid
b)
monosaccharide
c)
fatty acid
d)
nucleic acid
55.

Which of the following describes the secondary structure of proteins?

a)

The sequence of amino acids

b)

The α-helix and β-pleated sheet folding

c)

The folding of the polypeptide chain due to the 'R' groups

d)

The joining of different protein molecules to make one big molecule

56.
The name of the initial chain of monomers in a protein is called.....
a)
polypeptide
b)
polysaccharide
c)
polyester
d)
polynucleotide
57.

The main bonding in the secondary structure of a protein is due to.....

a)

covalent bonding

b)

ionic bonding

c)

hydrogen bonding

d)

polar bonding

58.

The tertiary structure folding in proteins is primary due to the interactions of....

a)

the 'R' groups

b)

the 'P' groups

c)

the 'A' groups

d)

the 'S'

59.

Proteins that are roughly spherical

a)

globular proteins

b)

fibrous proteins

c)

enzymatic proteins

d)

storage proteins

e)

motor proteins

60.

Proteins that are long and thin

a)

globular proteins

b)

fibrous proteins

c)

enzymatic proteins

d)

storage proteins

e)

motor proteins

61.

Which of the following term refers to the order in which amino acids are linked together in a protein.

a)

primary structure

b)

secondary structure

c)

tertiary structure

d)

quaternary structure

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