How are products predicted in a double displacement reaction?
Answer and explanation
Correct answer: By exchanging ions of two compounds
A double displacement reaction generally occurs between two ionic compounds. The positive ions, or cations, exchange partners with the negative ions, or anions, of the other compound. For example, in AB + CD, the new combinations are AD and CB, provided the resulting substances are chemically possible, such as a precipitate, gas, or water. Therefore option B gives the governing principle; the other choices describe unrelated physical or chemical processes.
Frequently asked questions
What is the correct answer to this question?
By exchanging ions of two compounds
Why is this the correct answer?
A double displacement reaction generally occurs between two ionic compounds. The positive ions, or cations, exchange partners with the negative ions, or anions, of the other compound. For example, in AB + CD, the new combinations are AD and CB, provided the resulting substances are chemically possible, such as a precipitate, gas, or water. Therefore option B gives the governing principle; the other choices describe unrelated physical or chemical processes.
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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