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IB Diploma Chemistry 2 (SL) Review

Total questions: 40

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

Which one of the following is the electron arrangement of the strongest reducing agent?

a)

1s2 2s2 2p5

b)

1s2 2s2 2p6 3s2

c)

1s2 2s2 2p6 3s2 3p5

d)

1s2 2s2 2p6 3s2 3p6 4s2

2.

Molecules with a permanent dipole include

1 NH3

2 PCl3

3 SCl2

4 SiCl4

a)

1, 2 and 3 only are correct.

b)

1 and 3 only are correct.

c)

2 and 4 only are correct.

d)

4 only is correct.

3.

The percentage by mass of the elements in a compound is

C=72%, H=12%, O=16%.


What is the mole ratio of C : H in the empirical formula of this compound?

a)

1:1

b)

1:2

c)

1:6

d)

6:1

4.

Based on electronegativity values, which bond is the most polar?

a)

B⎼C

b)

C⎼O

c)

N⎼O

d)

O⎼F

5.

Which of the quantities in the enthalpy level diagram below is (are) affected by the use of a catalyst?

a)

I only

b)

III only

c)

I and II only

d)

II and III only

6.

Which statement about neighbouring members of all homologous series is correct?

a)

They have the same empirical formula.

b)

They differ by a CH2 group.

c)

They possess different functional groups.

d)

They differ in their degree of unsaturation.

7.

A compound contains 40.00% carbon, 6.73% hydrogen and 53.27% oxygen by mass. Determine the empirical formula.

a)

CHO

b)

CH2O

c)

CH2O2

d)

CHO2

8.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
9.
In the symbol 20682Pb what does 206 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of protons
10.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
11.
The name for protons and neutrons in nuclear chemistry is____
a)
beta particles
b)
positrons
c)
nucleons
d)
nuclides
12.

In the symbol 167N what the 7 stand for?

a)

Mass number

b)

Atomic number

c)

Atomic mass

d)

Number of neutrons

13.
In fission neutron is often used to start the reaction and it is also a product of the reaction. This is called a ____
a)
neutron emission
b)
nuclear fusion
c)
domino effect
d)
chain reaction
14.

Which of the following are compounds?

a)

1, 2, 3

b)

2, 3, 4

c)

1, 4, 5

d)

3, 4, 5

15.

How many alcohols have the general formula C4H10O?

a)

3

b)

4

c)

5

d)

6

16.

What is the general formula of the alkyne series?

a)

CnHn

b)

CnH2n-2

c)

CnH2n

d)

CnH2n+2

17.

Which compound can both be esterified and turn acidified potassium dichromate(VI) solution green?

a)

(CH3)3COH

b)

CH3CH2CO2H

c)

(CH3)2CHOH

d)

CH3CH2COCH3

18.

What is the mechanism of the reaction between ethane and chlorine in sunlight?

a)

Free radical substitution

b)

Free radical addition

c)

Electrophilic substitution

d)

Electrophilic addition

19.

Which is propyl propanoate?

a)

CH3CH2CH2OOCCH2CH3

b)

CH3CH2CH2COOCH2CH3

c)

CH3CH2CH2COCH2CH3

d)

CH3CH2CH2OCH2CH2CH3

20.

A compound decolorizes bromine water in the dark. Which statement is correct?

a)

It contains C=C and is an alkene.

b)

It contains C–C and is an alkene.

c)

It contains C=C and is an alkane.

d)

It contains C–C and is an alkane.

21.

Which compound could be X in the two-stage reaction pathway?

C2H4 → X → C2H5OH

a)

C2H6

b)

C2H3OH

c)

C2H5Br

d)

C2H4Cl2

22.

Applying IUPAC rules, what is the name of the compound?

a)

1-ethyl-1,3-dimethylbut-2-ene

b)

2-ethyl-4-methylpent-3-ene

c)

2-methyl-4-ethylpent-3-ene

d)

2,4-dimethylhex-2-ene

23.

Which combination best describes the substitution reaction between bromoethane and dilute aqueous sodium hydroxide?


CH3CH2Br + OH− → CH3CH2OH + Br–

a)

A

b)

B

c)

C

d)

D

24.

What is the oxidation number of chlorine in HClO?

a)

0

b)

-1

c)

+1

d)

+5

25.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

26.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

27.

What is the oxidation number of nitrogen in N2?

a)

-3

b)

0

c)

+4

d)

-1

28.

The sum of the oxidation numbers in SCN- is equivalent to

a)

0

b)

-1

c)

+1

d)

+3

29.

The sum of the oxidation numbers in Na2CO3 is equivalent to

a)

0

b)

-2

c)

+1

d)

-1

30.

Determine the oxidation number of chromate in CrO42-.

a)

+6

b)

0

c)

+2

d)

+3

31.

Which of the following represents oxidation?

a)

C → CH4

b)

Fe3+ → Fe2+

c)

Cl2 → 2Cl-

d)

Zn → ZnO

32.

In the reaction Zn + 2HCl --> ZnCl2 + H2

which element, if any, is oxidized?

a)

Zinc

b)

Hydrogen

c)

Chlorine

d)

None

33.
What two factors govern whether a collision between reacting particles will be effective?
a)
orientation and potential energy 
b)
kinetic energy and temperature 
c)
kinetic energy and orientation 
d)
potential energy and kinetic energy 
34.

More frequent collisions correspond to a:

a)

Faster reaction rate

b)

Slower reaction rate

c)

Constant reaction rate

d)

None of the above

35.
Why does a higher temperature increase the rate of a reaction?
a)
it increases both the frequency and energy of particle collisions
b)
it only increases the frequency of particle collisions
c)
it only increases the energy of particle collisions
d)
it reduces the activation energy of the reaction
36.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
37.
2CO  +  O2  −-> 2CO2
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
a)
10
b)
20
c)
1
d)
5
38.
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?
a)
82%
b)
0.82%
c)
10.1 %
d)
100%
39.
How many liters of NH3 are needed to react completely with 30.0L of NO?
4NH3+6NO --> 5N2 + 6H2O
a)
5.0 L
b)
20.0 L
c)
7.5 L
d)
120.0 L
40.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon

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