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Worksheets11 Chemistry review
Total questions: 37
Worksheet time: 25mins
Name
Class
Date
1.
How many valence electrons does the element potassium have?
a)
1
b)
2
c)
4
d)
8
2.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
3.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
4.
What is an example of an element that doesn't like to bond?
a)
Neon
b)
Oxygen
c)
Hydrogen
d)
Selenium
5.
Which of the following particles are free to drift in metals?
a)
neutrons
b)
cations
c)
protons
d)
electrons
6.
Which of the following is true of ionic bonds?
a)
Electrons are completely transferred during bonding
b)
Electrons are shared during bonding
c)
Electrons are not involved with bonding
d)
All of the above
7.
Elements on the LEFT side of the periodic table will most likely form:
a)
Positive ions
b)
Negative ions
c)
Neutral Ions
d)
None of these
8.
Elements on the RIGHT side of the periodic table will most likely form:
a)
Negative ions
b)
Positive ions
c)
Cations
d)
Neutral ions
9.
A chemical bond is:
a)
Made up of electrons
b)
An attractive force that holds atoms together
c)
All of the above
d)
None of the above
10.
The charge of a normal atom is:
a)
Positive
b)
Neutral
c)
Negative
11.
Most atoms have no net charge because they have....
a)
an equal number of charged and non-charged particles
b)
neutrons in their nuclei
c)
an equal number of electrons and protons
d)
an equal number of neutrons and protons
12.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
13.
When atoms share more than one pair of electrons
a)
Single Bond
b)
Double Bond
c)
Triple Bond
d)
None of The Above
14.
Is Hydrogen considered a metal or a non-metal?
a)
Metal
b)
Non-metal
15.
The correct formula for calcium phosphate
a)
Ca3PO4
b)
Ca6PO4
c)
Ca3(PO4)2
d)
Ca2 (PO4)3
16.
A catalyst works by
a)
changing the order of the reaction
b)
increasing the temperature
c)
lowering the activation energy
d)
making the activated complex
17.
Which of the following does not affect reaction rates
a)
reactivity
b)
concentration
c)
surface area
d)
color
18.
Acids turn
a)
red litmus blue
b)
blue litmus red
19.
A neutralization reaction produces
a)
carbon dioxide and water
b)
a salt and water
c)
H and OH
d)
varies for every reaction
20.
To determine the concentration of an unknown acid or base use
a)
reaction rates
b)
equilibrium
c)
titration
d)
calorimetry
21.
For a reaction to proceed there must be
a)
a catalyst
b)
effective collisions
c)
conditions for equilibrium
d)
lots of products
22.
Which of the following does not affect reaction rates?
a)
catalyst
b)
nature of reactants
c)
time
d)
surface area
23.
what kind of molecule is this?
a)
alkane
b)
alkene
c)
alkyne
d)
cycloalkane
24.
Give the name of this compound...
C3H8
C3H8
a)
Propene
b)
Butane
c)
Butene
d)
Propane
25.
Unsaturated hydrocarbons contain ___.
a)
at least one double or triple bond between carbon atoms
b)
only double bonds
c)
only single bonds between carbon atoms
d)
only triple bonds
26.
process of separating a mixture of liquids by their boiling points
a)
filtration
b)
distillation
c)
evaporation
d)
sublimation
27.
compounds that consist only of hydrogen and carbon atoms and all bonds are single bonds
a)
hydrocarbons
b)
alkanes
c)
nonpolar molecule
d)
polar molecule
28.
What does a catalyst do?
a)
Stabilises a reaction
b)
Increases the rate of reaction
c)
Cools the reaction down
d)
Increases the concentration of the reaction
29.
What does NOT happen when the temperature is increased?
a)
Particles collide more often
b)
Particles collide with more energy
c)
Particles move faster
d)
More particles collide in the correct orientation
30.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
31.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
32.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
33.
How many grams of potassium dichromate will dissolve in 100 g of water at 50oC forming a saturated solution?
a)
20g
b)
30g
c)
40g
d)
50g
34.
Located on the left side of the reaction
a)
reactants
b)
products
35.
Predict the products for the decomposition of calcium carbonate: CaCO3
a)
CaO + CO2
b)
Ca + CO3
c)
CaCO2 + O2
d)
CaO + CO3
36.
Predict the products for the this reaction:
K + HCl -->
K + HCl -->
a)
KCl + H2
b)
KHCl
c)
KH + Cl2
d)
KCl + H
37.
Predict the products for the this reaction:
Mg + CuCl2 -->
Mg + CuCl2 -->
a)
MgCl2 + Cu
b)
MgCl + Cu
c)
MgCu + Cl2
d)
CuMg + Cl2
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