What is the simplest way to identify a double displacement reaction?
Answer and explanation
Correct answer: Exchange of ions between two compounds
The defining concept of a double displacement reaction is the exchange of ions between two compounds, usually ionic compounds in aqueous solution. Its general pattern is \(AB + CD \rightarrow AD + CB\): the positive or negative ions change partners and two new compounds may form. Burning a metal is combustion, while melting and liquefaction are physical changes rather than ionic chemical reactions.
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What is the correct answer to this question?
Exchange of ions between two compounds
Why is this the correct answer?
The defining concept of a double displacement reaction is the exchange of ions between two compounds, usually ionic compounds in aqueous solution. Its general pattern is \(AB + CD \rightarrow AD + CB\): the positive or negative ions change partners and two new compounds may form. Burning a metal is combustion, while melting and liquefaction are physical changes rather than ionic chemical reactions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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