WorksheetsLesson 4. (6+7)
Total questions: 6
Worksheet time: 5mins
Name
Class
Date
1.
What is the chemical formula of water?
a)
H2O
b)
NaCl
c)
CO2
d)
H2O2
2.
What is the chemical formula of methane?
a)
H2O
b)
CH4
c)
CO
d)
H2O2
3.
In the equation C + O₂ → CO₂, what are the reactants?
a)
C and O₂
b)
C and H₂O
c)
O₂ and CO
d)
C CO
4.
In the reaction X +Y-----> A + B, reactant X has 12g, reactant Y has 3 g and product B has 5g. How many grams should product A have?
a)
6g
b)
8g
c)
10g
d)
12g
5.
The equation is balanced: aCO + O₂ → aCO₂. What is the value of a?
a)
1
b)
2
c)
3
d)
4
e)
5
6.
What is the balanced equation for the combustion of propane (C₃H₈)?
a)
C₃H₈ + 3O₂ → 3CO₂ + 3H₂O
b)
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
c)
C₃H₈ + 4O₂ → 3CO₂ + 4H₂O
d)
C₃H₈ + 2O₂ → 3CO₂ + 2H₂O
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