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Fundamentals

Chemical reactions involve changes - changes of reactants into products. Basic chemical reactions can be grouped into categories based on the types of changes that are occuring during the reaction. There are five basic categories - synthesis, decomposition, combustion, single replacement, and double replacement.
 

There is only one question in this Question Group. But each time the question appears, the ordering of answers is scrambled.  Here is the question.


The Question:
Which one these statements describes how to typically tell the difference between a single replacement (SR) reaction and a double replacement (DR) reaction?

An SR reaction involves the reaction of an element with a compound and a DR reaction involves the reaction of two compounds.
An SR reaction involves the reaction of an element with a compound and a DR reaction involves the reaction of two elements.
An SR reaction involves the reaction of two elements and a DR reaction involves the reaction of two compounds.
A DR reaction is twice as long as an SR reaction.
 

How to Think About This Situation

To be successful with this question, you need to understand the distinction between Single Replacement and Double Replacement reaction types. Once understood, you will be able to answer this question easily. The infographic below describes each of the five reaction types. You will find information on Single Replacement and Double Replacement at the bottom of the infographic. Study it carefully and then answer the question.
 





 
 

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