Chemistry I Cp - Types Of Reactions
Identify the types of chemical reactions shown in each example.
Questions and Answers
- 1.
Calcium plus oxygen yields calcium oxide
- A.
Synthesis
- B.
Decomposition
- C.
Single replacement
- D.
Double replacement
Correct Answer
A. SynthesisExplanation
The given chemical equation "calcium plus oxygen yields calcium oxide" represents a synthesis reaction. In synthesis reactions, two or more substances combine to form a single compound. In this case, calcium and oxygen combine to form calcium oxide. The reactants (calcium and oxygen) are combined to produce the product (calcium oxide), making it a synthesis reaction.Rate this question:
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- 2.
Magnesium plus hydrochloric acid produces magnesium chloride and hydrogen
- A.
Synthesis
- B.
Decomposition
- C.
Single replacement
- D.
Double replacement
Correct Answer
C. Single replacementExplanation
In a single replacement reaction, one element replaces another element in a compound. In this case, magnesium (Mg) replaces hydrogen (H) in hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2). This reaction can be represented by the equation: Mg + 2HCl -> MgCl2 + H2.Rate this question:
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- 3.
Potassium iodide combines with lead II nitrate to produce lead II iodide and potassium nitrate
- A.
Synthesis
- B.
Decomposition
- C.
Single replacement
- D.
Double replacement
Correct Answer
D. Double replacementExplanation
In a double replacement reaction, the cations and anions of two different compounds switch places to form two new compounds. In this case, potassium iodide (KI) and lead II nitrate (Pb(NO3)2) react to form lead II iodide (PbI2) and potassium nitrate (KNO3). The potassium cation (K+) from potassium iodide combines with the nitrate anion (NO3-) from lead II nitrate to form potassium nitrate, while the lead II cation (Pb2+) from lead II nitrate combines with the iodide anion (I-) from potassium iodide to form lead II iodide. Hence, the reaction is a double replacement.Rate this question:
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- 4.
Sodium bromide reacts with fluorine to produce sodium fluoride and bromine gas
- A.
Synthesis
- B.
Decomposition
- C.
Single replacement
- D.
Double replacement
Correct Answer
C. Single replacementExplanation
In a single replacement reaction, one element replaces another element in a compound. In this case, sodium bromide (NaBr) reacts with fluorine (F2) to produce sodium fluoride (NaF) and bromine gas (Br2). The sodium atom in sodium bromide is replaced by the fluorine atom, resulting in the formation of sodium fluoride, while the bromine atom is released as bromine gas. Therefore, the given reaction is an example of a single replacement reaction.Rate this question:
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- 5.
Barium hydroxide combines with aluminum sulfate to produce aluminum hydroxude and barium sulfate
- A.
Synthesis
- B.
Decomposition
- C.
Single replacement
- D.
Double replacement
Correct Answer
D. Double replacementExplanation
In a double replacement reaction, the cations and anions of two different compounds switch places to form two new compounds. In this case, barium hydroxide (Ba(OH)2) combines with aluminum sulfate (Al2(SO4)3) to produce aluminum hydroxide (Al(OH)3) and barium sulfate (BaSO4). The cations (Ba and Al) switch places, as well as the anions (OH and SO4), resulting in the formation of two new compounds. Therefore, the given reaction is an example of a double replacement reaction.Rate this question:
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Mar 22, 2022Quiz Edited by
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Dec 04, 2008Quiz Created by
Jlee