Which statement is correct about gas density in atmospheric layers?
Answer and explanation
Correct answer: Gas density generally decreases with height
Option A is correct because atmospheric pressure and the number of molecules per unit volume generally decrease with altitude. Gravity keeps most gas near Earth’s surface, so upper layers become progressively more rarefied. Density is not zero in the stratosphere, and the exosphere has the lowest, not highest, density. The word “always” also makes option B scientifically incorrect.
Frequently asked questions
What is the correct answer to this question?
Gas density generally decreases with height
Why is this the correct answer?
Option A is correct because atmospheric pressure and the number of molecules per unit volume generally decrease with altitude. Gravity keeps most gas near Earth’s surface, so upper layers become progressively more rarefied. Density is not zero in the stratosphere, and the exosphere has the lowest, not highest, density. The word “always” also makes option B scientifically incorrect.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting. Topic: accounting principles.
