Which equation represents a single replacement reaction?
A) 
B) 
C) 
D) 
In which type of chemical reaction do two or more reactants combine to form one product, only?
A) synthesis
B) decomposition
C) single replacement
D) double replacement
The Correct Answer and Explanation is :
Question 1: Identifying a Single Replacement Reaction
A single replacement reaction occurs when one element replaces another element in a compound. The general form of a single replacement reaction is: A+BC→AC+BA + BC \rightarrow AC + B
Here, element AA replaces element BB in compound BCBC, forming ACAC and releasing BB.
Looking at the provided link to the chemical equation:
- If the equation matches the form of a single replacement reaction, then that is the correct answer.
Since I cannot directly access the image at the link, let me know if you can describe the equation so I can confirm.
Question 2: Reaction with Two Reactants Forming One Product
The type of reaction where two or more reactants combine to form a single product is a synthesis reaction. The general form of a synthesis reaction is: A+B→ABA + B \rightarrow AB
Here are the reasons why A) synthesis is correct:
- Definition: A synthesis reaction, also called a combination reaction, involves the union of two or more substances (elements or compounds) to form a single, more complex compound. For example: 2H2+O2→2H2O2H_2 + O_2 \rightarrow 2H_2O
- Distinct Characteristics:
- Unlike decomposition reactions (option B), which break a single compound into simpler substances, synthesis reactions build complexity.
- Unlike single replacement reactions (option C), synthesis does not involve swapping elements between compounds.
- Unlike double replacement reactions (option D), synthesis results in only one product instead of an exchange between compounds.
- Examples in Real Life:
- Formation of water from hydrogen and oxygen.
- Combination of sodium (NaNa) and chlorine (Cl2Cl_2) to form sodium chloride (NaClNaCl).
Thus, the correct answer for the second question is A) synthesis.