Pretest - Chemical Reactions
Needed SKILLS: Can you classify reactions, balance equations, and predict products?
- 1.
Classify the chemical reaction: MgCl2 + Li2CO3 >>> MgCO3 + LiCl
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single displacement
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
E. Double displacementExplanation
All compounds in the reaction means DOUBLE DISPLACEMENTRate this question:
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- 2.
Classify the chemical reaction: P4 + 3 O2 >>> 2 P2O3
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single disreplacement
- E.
Double replacement
- F.
Acid / base reaction
Correct Answer
A. SythesisExplanation
One product = SYNTHESIS REACTIONRate this question:
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- 3.
Classify the chemical reaction: C6H12 + 9 O2 >>> 6 CO2 + 6 H2O
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single displacement
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
C. CombustionExplanation
O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTIONRate this question:
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- 4.
Classify the chemical reaction: Pb + FeSO4 >>> PbSO4 + Fe
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single displacement
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
D. Single displacementExplanation
If you have an element and compound on both sides = SINGLE DISPLACEMENTRate this question:
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- 5.
Classify the chemical reaction: CaCO3 >>> CaO + CO2
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single displacement
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
B. DecompositionExplanation
One reactant = DECOMPOSITION REACTIONRate this question:
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- 6.
Classify the chemical reaction: C4H8 + O2 >>> CO2 + 6 H2O
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single displacement
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
C. CombustionExplanation
O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTIONRate this question:
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- 7.
Classify the chemical reaction: KOH + H2SO4 >>> K2SO4 + H2O
- A.
Sythesis
- B.
Decomposition
- C.
Combustion
- D.
Single displacement
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
F. Acid base or neutralization reactionExplanation
Base (KOH) + acid (H2SO4) = acid base reactionRate this question:
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- 8.
Predict the products: AlCl3 + Cs >>>
- A.
K2SO4 + H2O
- B.
AlCs + Cl
- C.
Al + ClCs
- D.
CsCl + Al
- E.
Double displacement
- F.
Acid base or neutralization reaction
Correct Answer
D. CsCl + AlExplanation
element + compound reactants tells you it is going to be a Single Displacement. Switch the cationsRate this question:
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- 9.
Predict the products: CH4 + O2 >>>
- A.
CH4 + O2
- B.
O2 + H4C
- C.
H2O + CO2
- D.
H4O + CH
Correct Answer
C. H2O + CO2Explanation
Carbon compound and oxygen = COMBUSTION REACTION. Products are water and carbon dioxideRate this question:
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- 10.
Where do you find the reactants and products in a chemical reaction
- A.
Reactants >>> products
- B.
Products >>> reactants
- C.
Didn't learn that
- D.
Don't know
Correct Answer
A. Reactants >>> productsExplanation
Reactants are on the left side of arrow and Products are on the right side of arrowRate this question:
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- 11.
ONLY Place the coefficient in your answer___ P + ____ O2 ➥ ____ P2O5
Correct Answer
4 - 5 - 2Explanation
The given equation represents the balanced chemical equation for the reaction between P and O2 to form P2O5. The coefficients in front of the chemical formulas represent the number of moles of each substance involved in the reaction. In this case, the coefficient for P is 4, indicating that 4 moles of P react. The coefficient for O2 is 5, indicating that 5 moles of O2 react. Finally, the coefficient for P2O5 is 2, indicating that 2 moles of P2O5 are formed.Rate this question:
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Mar 08, 2015Quiz Created by
Kyle Pearson
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