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WorksheetsChemical formula and reactions
Total questions: 20
Worksheet time: 5hrs 0mins
Name
Class
Date
1.
What is a valence electron?
a)
The sum of neutrons and protons.
b)
The # of electrons in the last shell.
c)
A type of bond.
d)
A popular compound.
2.
Ionic bonds are between...
a)
nonmetals and nonmetals
b)
carbon and oxygen
c)
metals and nonmentals
d)
hydrogen and chlorine
3.
Covalent bonds are between...
a)
two or more nonmetals
b)
sodium and chlorine
c)
metals and metals
d)
metals and nonmetals
4.
sulfuric acid
a)
HSO3
b)
H2SO3
c)
H2SO4
d)
H3SO4
5.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide
6.
In a neutralization reaction, what are the products of a reaction between an acid and a base?
a)
Another acid and base
b)
Carbon dioxide and a salt
c)
Water and a salt
d)
Either two acids or two bases
7.
Basic oxide
a)
BaO
b)
P2O5
c)
ZnO
d)
CO2
8.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
9.
Which is NOT an amphoteric oxide?
a)
zinc oxide
b)
aluminium oxide
c)
lead (II) oxid
d)
sodium oxide
10.
Which of the followings is an acidic oxide?
a)
SO2
b)
H2O
c)
CO
d)
ZnO
11.
Which oxide is able to react with HNO3?
a)
MgO
b)
CO2
c)
NO2
d)
CO
12.
Sulfuric acid reacts with sodium carbonate to form
a)
hydrogen gas
b)
carbon dioxide gas
c)
sodium sulfate
d)
water
13.
How is calcium hydroxide solution produced?
a)
Calcium carbonate and water
b)
Calcium oxide and water
c)
Calcium carbonate and acid
d)
calcium oxide and acid
14.
Which is the name of the kind of solid substance formed in this figure?
a)
aqueous
b)
precipitate
c)
acid
d)
synthesis
15.
An element plus additional element reacts to form one product is an example of which type of chemical reaction?
a)
combustion
b)
decomposition
c)
synthesis
d)
single replacement
16.
How many Nitrogen (N) atoms are in 4NH3?
a)
4
b)
1
c)
3
d)
12
17.
Balance this equation, CaCO3(s) → CaO(s) + CO2(g)?
a)
3,1,2
b)
1,1,1
c)
1,3,1
d)
2,6,3
18.
Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl
a)
3,1,3,1
b)
1,3,3,1
c)
1,1,1,3
d)
1,3,1,3
19.
Balance the following equation: Cr(s) + Fe(NO3)2 (ag) → Fe(s) + Cr(NO3)3 (ag)
a)
2,3,3,2
b)
2,3,2,3
c)
4,6,6,2
d)
1,3,3,1
20.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
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