If a container becomes cold during a process and gas is observed evolving, what is the most cautious conclusion?
Answer and explanation
Correct answer: Gas has evolved and the process may have absorbed heat; these observations alone do not establish the exact nature of the process.
A cooling container may indicate that the process has absorbed heat from its surroundings, so it may be endothermic. Gas evolution has also been observed, but these two observations alone cannot identify the exact type of chemical reaction. For example, gas evolution does not by itself prove that a reaction is exothermic, so option B is not justified.
Frequently asked questions
What is the correct answer to this question?
Gas has evolved and the process may have absorbed heat; these observations alone do not establish the exact nature of the process.
Why is this the correct answer?
A cooling container may indicate that the process has absorbed heat from its surroundings, so it may be endothermic. Gas evolution has also been observed, but these two observations alone cannot identify the exact type of chemical reaction. For example, gas evolution does not by itself prove that a reaction is exothermic, so option B is not justified.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
