In an unknown reaction, a white solid forms and does not dissolve in water. What is the most suitable identification?
Answer and explanation
Correct answer: It may be a precipitation reaction
The governing observation is the formation of an insoluble solid from a reaction mixture. Such an insoluble product is called a precipitate, and a reaction that forms it in solution may be identified as a precipitation reaction. Option A is deliberately phrased as “may” because colour and insolubility alone do not establish the complete reaction type with certainty. Combustion, photolytic decomposition, and a purely physical change cannot be concluded from this observation.
Frequently asked questions
What is the correct answer to this question?
It may be a precipitation reaction
Why is this the correct answer?
The governing observation is the formation of an insoluble solid from a reaction mixture. Such an insoluble product is called a precipitate, and a reaction that forms it in solution may be identified as a precipitation reaction. Option A is deliberately phrased as “may” because colour and insolubility alone do not establish the complete reaction type with certainty. Combustion, photolytic decomposition, and a purely physical change cannot be concluded from this observation.
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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