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WorksheetsCarbon-Introduction
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
The number of protons that carbon has is:
a)
5
b)
6
c)
7
d)
8
2.
In the free state, carbon exists as:
a)
CO2
b)
Na2CO3
c)
coal
d)
methane
3.
Hydrocarbons are compounds containing:
a)
hydrogen and carbon
b)
carbon and water
c)
hydrogen and carbon compounds
d)
hydrogen and water
4.
Washing soda is:
a)
Na2CO2
b)
NaHCO4
c)
NaHCO3
d)
Na2CO3
5.
A gaseous compound of carbon that is an air pollutant is:
a)
CS2
b)
CO
c)
CO3
d)
CH3
6.
Carbon is:
a)
monovalent
b)
divalent
c)
trivalent
d)
tetravalent
7.
When CO2 is dissolved in water, it forms:
a)
H2CO3
b)
HCO3
c)
H2CO2
d)
H2CO4
8.
Natural gas is mainly composed of:
a)
butane
b)
ethane
c)
methane
d)
propane
9.
Marble is:
a)
calcium carbonate
b)
calcium bicarbonate
c)
calcium oxide
d)
calcium hydroxide
10.
Vinegar is:
a)
malic acid
b)
citric acid
c)
carbonic acid
d)
acetic acid
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