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Chemistry CSEC MC

Total questions: 100

Worksheet time: 2hrs 12mins

Name
Class
Date
1.

Ethanol and water can be separated by fractional Distillation because they

a)

are chemically similar

b)

have different densities

c)

are immiscible

d)

have different boiling points

2.

what is an atom

a)

smallest part of the universe

b)

smallest part of a substance

c)

smallest part of anything

d)

smallest part of water

3.
What are the positively charged particles in an atom?
a)
Protons
b)
Neutrons
c)
Electrons
4.
A catalyst  
a)
is added to a reaction to make it slow down 
b)
breaks apart and is changed 
c)
provides an energetic short cut to the products 
5.
The compounds or elements present at the end of a reaction 
a)
reactants
b)
catalyst
c)
products
d)
energy 
6.
Which of the following reactions is a combustion reaction ? 
a)
MgCO3 + O2 → MgO + CO2  
b)
C3H8 + 5O2 → 3CO2 + 4H2O 
c)
6CO2 + 6H2O → C6H12O6 + 6O2 
d)
6CO2 + 6H2O → C6H12O6 + 6O2 
7.
Explain this graph
a)
A catalyst is used to speed up the reaction rate
b)
The catalyst provides a short cut to the products
c)
The red line shows how the catalyst saves energy 
d)
All of these choices
8.
The rings around the nucleus of an atom are called...
a)
energy levels
b)
electron circles
c)
proton levels
d)
neutron clouds
9.
What is the atomic number of Carbon-13 (C)?
a)
13
b)
12.01
c)
6
d)
26
10.
How many neutrons would Potassium-41 (K) have?
a)
22
b)
19
c)
41
d)
1
11.
Which is NOT a property of metals?
a)
shiny
b)
good conductor
c)
has full outer shell 
d)
tends to lose electrons
12.
Rows ⋘---⋙ on the periodic table indicate the number of...
a)
groups
b)
energy levels
c)
valence electrons
d)
total electrons
13.
A particle of the same element with a different mass due to gaining or losing neutrons is called...
a)
ion
b)
electron
c)
atom
d)
isotope
14.
When becoming an ion, an element with 6 valence (outer) electrons would have a charge of...
a)
2-
b)
2+
c)
6-
d)
6+
15.
a)
This is an ionic bond with electrons shared
b)
This is an ionic bond with electrons transferred
c)
This is a covalent bond with electrons shared
d)
This is a covalent bond with electrons transferred
16.
What bonds to make an ionic bonds?
a)
metals and metals
b)
metals and nonmetals
c)
nonmetals and metalloids
d)
nonmetals and nonmetals
17.
During an endothermic reaction, energy will be...
a)
released
b)
absorbed
c)
destroyed
d)
created
18.
Activation energy is needed during what part of a chemical reaction?
a)
to end a chemical reaction
b)
during a chemical reaction
c)
to start a chemical reation
19.

A 3.7 g sample of copper(II) carbonate is added to 25 cm3 of 2.0 mol dm–3 hydrochloric acid. Which volume of gas is produced under room conditions?

a)

A 0.60 dm3

b)

0.72 dm3

c)

1.20 dm3

d)

2.40 dm3

20.
What is the chemical symbol for mercury?
a)
Hg
b)
Mc
c)
My
d)
C
21.

Which sub-atomic particle is responsible for reactions between most atoms?

a)

Proton

b)

Neutron

c)

Electron

d)

None of these

22.

Covalent bonds are bonds between atoms that:

a)

Share electrons

b)

Transfer electrons

c)

Share neutrons

d)

Share protons

23.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
24.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
25.
In a chemical reaction, everything to the rightof the arrow is called ______________.
a)
Products
b)
Yields
c)
Molecules
d)
Reactants
26.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
27.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
28.
What element is this?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
29.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
30.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
31.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
32.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
33.

name the group that has a single bond

a)

alkenes

b)

alcohols

c)

alkanes

d)

ethers

34.

the name of this compaund C4H10

a)

METHANE

b)

HEXENE

c)

BUTANOIC ACID

d)

BUTANE

35.

The group made up of alcohols and acids

a)

esters

b)

carbocilic acids

c)

ethers

d)

alkynes

36.

Macromolecule that is made up of repeated structure called monomers

a)

protein

b)

amino acids

c)

polymer

37.

organic polymer can be divided into

a)

synthetic organic polymer

b)

natural organic polymer

c)

all of the above

38.

the type of reaction that occur in alkenes

a)

elimination

b)

substitution

c)

addition

39.
Is this hydrocarbon saturated or unsaturated? 
a)
saturated
b)
unsaturated
40.
What type of molecule is it:
a)
alkene
b)
alkyne
c)
alkane
d)
amino acid
41.
The molecular formula for Heptane is
a)
C4H10
b)
C8H18
c)
C5H12
d)
C7H16
42.
Name this alkane.
a)
propane
b)
octane
c)
hexane
d)
butane
43.

Which diagram gives the skeletal formula of

2-chloropentan-3-ol ?

a)

A

b)

B

c)

C

d)

D

44.

What is a functional group?

a)

Atoms or group of atoms that give specific characteristics to a molecule

b)

Group of molecules that make up a group of atoms

c)

Group of molecules that give specific characteristics to an atom

d)

Group of atoms that give specific characteristics to an element

45.
Which molecular chemical bond found commonly in organic compounds?
a)
Hydrogen Bond
b)
Ionic Bond
c)
Van Der Waals Force 
d)
Covalent Bond
46.
Using combustion reaction of hydrocarbon, empirical formula of hydrocarbon is found as CH2O . If the molar mass of hydrocarbon is 180g/mol what is the molecular formula of the hydrocarbon ? (C:12g/mol, H:1g/mol, O:16g/mol)
a)
C12H24O12
b)
C8H16O8
c)
C6H12O6
d)
C3H6O3
47.

Which of the following is an organic compound?

a)

CO2

b)

CH3COOH

c)

Na2CO3

d)

NaHCO3

48.

The compounds which contain only carbon and hydrogen are called_____________.

a)

alkanes.

b)

alkenes.

c)

organic compounds.

d)

hydrocarbons.

49.
The longer the hydrocarbon, the _______ the boiling point
a)
Lower
b)
Higher
50.
What is the exam definition of saturated?
a)
No single bonds
b)
Contains a double bond
c)
No single bonds, all double bonds
d)
No double bonds, all single bonds
51.
What liquid detects the presence of an alkene?
a)
Alkene water
b)
Bromine water
c)
Water
d)
Limewater
52.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing surface area

d)

all of these

53.
Why does breaking up a solid reactant increase the rate of reaction?
a)
it creates more solid
b)
it creates more energy
c)
it increases the surface area
d)
it increases the concentration
54.

The amount of something; how many particles in a volume of a mixture

a)

Rate

b)

Collision

c)

Catalyst

d)

Concentration

55.

How is this equipment being used to measure the rate of reaction?

a)

The gas syringe measures how much gas is produced in a certain time

b)

The reaction mixture will increase in volume in a certain time

56.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
57.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
58.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
59.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
60.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
61.
2 NaBr + 1 Ca(OH)2 ----> 1 CaBr2 + 2 NaOH
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
62.
2 NH3+ 1 H2SO4 ----> 1 (NH4)2SO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
63.
1 Li3N + 3 NH4NO3 ----> 3 LiNO3 + 1 (NH4)3N
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
64.
Na3PO4 + 3 KOH ----> 3 NaOH + K3PO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
65.
Pb + FeSO4 ----> PbSO4 + Fe
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
66.
CaCO3 ----> CaO + CO2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
67.
MgCl2 + Li2CO3 ----> MgCO3 + 2 LiCl
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
68.
2 RbNO3 + BeF2 ----> Be(NO3)2 + 2 RbF
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
69.
2 AgNO3 + Cu ----> Cu(NO3)2 + 2 Ag
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
70.

What reaction has the following general formula:
 CxHy + O2 −>CO2 + H2OC_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

71.

What is the general reaction scheme for a combination reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

CxHy+O2 −> CO2+H2OC_xH_y+O_2\ ->\ CO_2+H_2O

72.

What is the general reaction scheme for a double replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

CxHy+O2 −> CO2+H2OC_xH_y+O_2\ ->\ CO_2+H_2O

73.

What type of reaction is the following:
 Zn + 2HCl −> ZnCl2+H2Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2 

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

74.
What is the name of a negatively charged electrode?
a)
cathode
b)
anode
c)
cation
d)
anion
75.
What is the name of a positively charged electrode?
a)
cathode
b)
anode
c)
cation
d)
anion
76.
What state must the ionic compound be in to be electrolysed?
a)
aqueous only
b)
solid only
c)
solid or aqueous only
d)
molten or aqueous only
77.
In an aqueous solution of copper chloride, which ions are attracted to the negative electrode?
a)
Cu2+ and Cl- and H+ and OH-
b)
Cu2+ and H+ 
c)
 Cl- and OH-
d)
Cu2+ 
78.
In an aqueous solution of copper chloride, which substance is produced at the positive electrode
a)
copper
b)
chlorine
c)
oxygen
d)
chloride 
79.
Which statement correctly describes the 2 electrodes?
a)
The anode is negative and the cathode is positive
b)
The anode and cathode are both positive
c)
The anode is positive and the cathode is negative
d)
The anode and cathode are both negative.
80.
Positive ions (cations) will move towards the cathode (-) where they will discharge by....
a)
Breaking apart
b)
Losing electrons
c)
Clumping together.
d)
Gaining electrons
81.

What is the equation to show what happens to chloride ions at the anode.

a)

Cl- --> Cl + e-

b)

2Cl- --> Cl2 + 2e-

c)

Cl2 + 2e- 2Cl-

d)

Cl2 + 2e- --> 2Cl-

82.

Why ionic compounds can not conduct electricity when they are solid?

a)

their electrons are not free to move

b)

their ions are free to move

c)

their ions are not free to move

d)

their electrons are free to move

83.

What change is observed at cathode during electrolysis of aqueous copper(II) chloride using carbon electrode

a)

Nothing

b)

pink solid deposit

c)

bubbles of green gas

d)

colourless gas

84.

Oxidation is loss of electron. Where does oxidation take place during electrolysis.

a)

At anode

b)

In the solution

c)

At the circuit

d)

At cathode

85.

When silver is being electroplated onto the cup,

a)

the cup is at the anode.

b)

silver is at the anode.

c)

the electrolyte is aqueous gold nitrate

86.
What is an ore?
a)
a solid metal
b)
a rock cantaining a metal combined with other elements
c)
an element
d)
an object used to row a boat
87.
What is the removal of oxygen from a substance called?
a)
reduction
b)
extraction
c)
electrolysis
d)
oxidation
88.
What is the name of the process that uses electricity to separate the elements in a compound?
a)
reduction
b)
electrolysis
c)
extraction
d)
mining
89.

A chemical reaction equation which the number of atoms in the reaction are the same for reactants and products

a)

Electrolysis

b)

Balance

c)

Products

d)

Reactants

90.

It is essential that the electrolyte is a liquid so that...

a)

Charged ions can migrate away from the electrodes.

b)

Charged ions can migrate towards the electrodes.

c)

The solution can move around.

d)

The current can flow through it.

91.
Reduction occurs at the 
a)
anode
b)
cathode
92.
What is the product formed at the cathode during the electrolysis of molten magnesium fluoride?
a)
magnesium
b)
hydrogen
c)
fluorine
d)
oxygen
93.

At the negative electrode copper ions get...

a)

reduced

b)

oxidised

c)

melted

d)

excited

94.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
95.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
96.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
97.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
98.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
99.
A subscript tells you...
a)
the # of atoms in the entire equation
b)
the # of elements in the equation
c)
the # atoms of the element it sits behind
d)
the # of compounds present
100.

Reduction is....

a)

Gain of electrons

b)

Loss of electrons

c)

Both the loss and gain of electrons

d)

None of these

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