WorksheetsChemical Word Equations
Total questions: 7
Worksheet time: 12mins
Name
Class
Date
1.
When a CHEMICAL reaction occurs, what is made?
a)
No new substance is made.
b)
A new substance is made with new atoms formed
c)
A new substance is made, with existing atoms rearranged
d)
All substances remain the same, but physical state may change.
2.
What does this word equation represent: Iron + oxygen → Iron oxide
a)
A physical change in iron (nothing new gets made)
b)
A chemical reactino between iron and oxygen, where rust (iron oxide) is produced
c)
A chemical reaction between iron and rust, where oxygen is produced
d)
A physical change between iron and oxygen that forms a red color
3.
Magnesium can be burned in air to produce solid magnesium oxide.
a)
2Mg(s) + O2(g)→ 2MgO(s)
b)
Mg(s) + O(g) → MgO(s)
c)
2Mg(s) + CO2(g) → 2MgO(s) + C(s)
d)
2Mg(s) + O2(g) → Mg2O2(s)
4.
Sodium reacts with chlorine to produce sodium chloride.
a)
NaCl(s) → Cl(g) + Na(s)
b)
Na(s) + CO2(g) → NaCO2(s)
c)
2Na(s) + Cl2(g) → 2NaCl(s)
d)
Na(s) + Cl(g) → NaCl
5.
Iron reacts with sulfur to produce iron(II) sulfide powder.
a)
2Fe(s) + S(s) → Fe2S(s)
b)
Fe(s) + S(s) → FeS(s)
c)
Fe(s) + S(g) → FeS(s)
d)
4Fe(s) + S2(g) → 2Fe2S
6.
When lead reacts with oxygen, a yellow lead(II) oxide powder is produced.
a)
2Pb(s) + O2(g) → 2PbO(s)
b)
Pb(s) + O2(g) → PbO2(aq)
c)
4Pb(s) + O2(g) → 2Pb2O(g)
d)
Pb(s) + O(g) → PbO(s)
7.
When hydrogen reacts with sulfur, a smelly gas is produced:
a)
H2(g) + 2S(s) → 2HS
b)
H2(g) + S(s) → H2S(g)
c)
H(g) + S(s) → HS(g)
d)
2H(g) + S(s) → H2S(g)
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