Which observation indicates that a reaction is endothermic?
Answer and explanation
Correct answer: The temperature of the container and its surroundings decreases
An endothermic reaction absorbs heat from its surroundings. Therefore, the temperature of the container and its surroundings may decrease, and the container may feel cold. In contrast, an increase in temperature usually indicates an exothermic reaction. Formation of a precipitate or production of gas may show that a reaction has occurred, but it does not by itself establish that the reaction is endothermic.
Frequently asked questions
What is the correct answer to this question?
The temperature of the container and its surroundings decreases
Why is this the correct answer?
An endothermic reaction absorbs heat from its surroundings. Therefore, the temperature of the container and its surroundings may decrease, and the container may feel cold. In contrast, an increase in temperature usually indicates an exothermic reaction. Formation of a precipitate or production of gas may show that a reaction has occurred, but it does not by itself establish that the reaction is endothermic.
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.
