Chemical Reactions

Word and Chemical Equations

Subtopic

Word and Chemical Equations under Chemical Reactions for Grade 9 IB.

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1.
$When a candle burns, the mass of the candle decreases. Why does this NOT violate the Law of Conservation of Mass?$
A. $The mass is destroyed by the flame$
B. $The mass is converted into light energy only$
C. $The products (gases) escape into the air$
D. $The law does not apply to fire$
2.
$(NH_4)_2SO_4$
A. $4$
B. $2$
C. $8$
D. $1$
3.
$What is the main difference between a word equation and a chemical formula equation?$
A. $Word equations use names; formula equations use symbols$
B. $Word equations are always balanced; formula equations are not$
C. $Formula equations use names; word equations use symbols$
D. $There is no difference$

Download the worksheet for Chemical Reactions - Word and Chemical Equations to practice offline. It includes additional chapter-level practice questions.

Balancing Equations

Subtopic

Balancing Equations under Chemical Reactions for Grade 9 IB.

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1.
$2Na + 2H_{2}O \rightarrow 2NaOH + H_{2}$
A. $2$
B. $3$
C. $4$
D. $5$
2.
$3CO_{2}$
A. $1$
B. $2$
C. $3$
D. $6$
3.
$2HgO \rightarrow xHg + O_{2}$
A. $1$
B. $2$
C. $3$
D. $4$

Download the worksheet for Chemical Reactions - Balancing Equations to practice offline. It includes additional chapter-level practice questions.

Types of Reactions (Synthesis, Decomposition, Combustion)

Subtopic

Types of Reactions (Synthesis, Decomposition, Combustion) under Chemical Reactions for Grade 9 IB.

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1.
$Which of these equations is NOT a synthesis reaction?$
A. $P_{4} + 5O_{2} \rightarrow P_{4}O_{10}$
B. $2Al + 3Br_{2} \rightarrow 2AlBr_{3}$
C. $2H_{2}O \rightarrow 2H_{2} + O_{2}$
D. $BaO + H_{2}O \rightarrow Ba(OH)_{2}$
2.
$When energy in the form of electricity is used to break down a compound, the process is often a type of:$
A. $Synthesis$
B. $Combustion$
C. $Decomposition$
D. $Double replacement$
3.
$C_{2}H_{5}OH + 3O_{2} \rightarrow 2CO_{2} + 3H_{2}O$
A. $O_{2}$
B. $CO_{2}$
C. $H_{2}O$
D. $C_{2}H_{5}OH$

Download the worksheet for Chemical Reactions - Types of Reactions (Synthesis, Decomposition, Combustion) to practice offline. It includes additional chapter-level practice questions.

Reaction Rates

Subtopic

Reaction Rates under Chemical Reactions for Grade 9 IB.

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Preview questions (no answers)

1.
$A catalyst works by:$
A. $Increasing the temperature of the reactants$
B. $Changing the products of the reaction$
C. $Providing a different pathway for the reaction to occur$
D. $Increasing the concentration of the reactants$
2.
$0.2 g/s$
A. $3 g$
B. $12 g$
C. $30 g$
D. $120 g$
3.
$To ensure a fair test when investigating the effect of surface area on reaction rate, what should be kept constant?$
A. $The surface area of the solid$
B. $The concentration and temperature of the liquid reactant$
C. $The time the reaction takes$
D. $The size of the particles$

Download the worksheet for Chemical Reactions - Reaction Rates to practice offline. It includes additional chapter-level practice questions.

Word and Chemical Equations

❓Preview questions (no answers)

Balancing Equations

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Types of Reactions (Synthesis, Decomposition, Combustion)

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Reaction Rates

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