If a container becomes cold and gas evolves in a reaction, what is the most careful conclusion?
Answer and explanation
Correct answer: A gas formed and heat may have been absorbed
A careful scientific conclusion must be based only on the observations. Gas evolution suggests that a gaseous product may have formed, often indicating a chemical reaction, while cooling of the container suggests that heat was absorbed from the surroundings. These observations support option A, but they do not identify the exact reaction or prove rusting. The other options either ignore an observation or make an unjustified claim.
Frequently asked questions
What is the correct answer to this question?
A gas formed and heat may have been absorbed
Why is this the correct answer?
A careful scientific conclusion must be based only on the observations. Gas evolution suggests that a gaseous product may have formed, often indicating a chemical reaction, while cooling of the container suggests that heat was absorbed from the surroundings. These observations support option A, but they do not identify the exact reaction or prove rusting. The other options either ignore an observation or make an unjustified claim.
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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