Pretest - Chemical Reactions - Quiz, Trivia & Questions

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| By Kyle Pearson

Kyle Pearson

Community Contributor

Quizzes Created: 34 | Total Attempts: 100,390

Questions: 11 | Attempts: 3,488 | Updated: Mar 21, 2023

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Needed SKILLS: Can you classify reactions, balance equations, and predict products?

Questions and Answers

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 displacement

Explanation
All compounds in the reaction means DOUBLE DISPLACEMENT

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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. Sythesis

Explanation
One product = SYNTHESIS REACTION

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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. Combustion

Explanation
O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

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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 displacement

Explanation
If you have an element and compound on both sides = SINGLE DISPLACEMENT

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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. Decomposition

Explanation
One reactant = DECOMPOSITION REACTION

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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. Combustion

Explanation
O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

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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 reaction

Explanation
Base (KOH) + acid (H2SO4) = acid base reaction

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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 + Al

Explanation
element + compound reactants tells you it is going to be a Single Displacement. Switch the cations

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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 + CO2

Explanation
Carbon compound and oxygen = COMBUSTION REACTION. Products are water and carbon dioxide

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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 >>> products

Explanation
Reactants are on the left side of arrow and Products are on the right side of arrow

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11.

ONLY Place the coefficient in your answer___ P + ____ O2 ➥ ____ P2O5

Correct Answer
4 - 5 - 2

Explanation
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.

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Mar 08, 2015

Quiz Created by
Kyle Pearson

Pretest - Chemical Reactions

Classify the chemical reaction: MgCl2 + Li2CO3 >>> MgCO3 + LiCl

Classify the chemical reaction: P4 + 3 O2 >>> 2 P2O3

Classify the chemical reaction: C6H12 + 9 O2 >>> 6 CO2 + 6 H2O

Classify the chemical reaction: Pb + FeSO4 >>> PbSO4 + Fe

Classify the chemical reaction: CaCO3 >>> CaO + CO2

Classify the chemical reaction: C4H8 + O2 >>> CO2 + 6 H2O

Classify the chemical reaction: KOH + H2SO4 >>> K2SO4 + H2O

Predict the products: AlCl3 + Cs >>>

Predict the products: CH4 + O2 >>>

Where do you find the reactants and products in a chemical reaction

ONLY Place the coefficient in your answer___ P + ____ O2 ➥ ____ P2O5

ONLY Place the coefficient in your answer_ P + O2 ➥ __ P2O5