If a container becomes cold during a reaction, what can it indicate?
Answer and explanation
Correct answer: The reaction absorbed heat
The governing concept is an endothermic energy change. If the container becomes cooler during a reaction, the reacting system may have absorbed heat from the surroundings, lowering the surroundings’ temperature. Therefore option A is correct. A reaction that releases heat would generally warm its surroundings, while burning and metal deposition are specific processes that cannot be concluded merely from cooling. The word “can” appropriately indicates an inference, not proof of one particular reaction.
Frequently asked questions
What is the correct answer to this question?
The reaction absorbed heat
Why is this the correct answer?
The governing concept is an endothermic energy change. If the container becomes cooler during a reaction, the reacting system may have absorbed heat from the surroundings, lowering the surroundings’ temperature. Therefore option A is correct. A reaction that releases heat would generally warm its surroundings, while burning and metal deposition are specific processes that cannot be concluded merely from cooling. The word “can” appropriately indicates an inference, not proof of one particular reaction.
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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