Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
About IS !!
Why are the test tubes of gases inverted ?
請專業人士給我專業的答案 !!
1 Answer
- 1 decade agoFavorite Answer
Is it really test tubes of gases inverted?
It is true that if the test tube contains gas less dense that air, then it will be inverted
Because if gas are denser than air, is floats. If test tube stands upwards, the gas may escape through some space at the opening
If it is inverted, even it floats in the test tube, the upper end is glass with no space to escape. This can prevent gas leakage
This method is called upward delivery
But for gases denser than air
We use downward delivery
that is the test tube stands upright
because denser gas sikns at the bottom
This is again used to prevent gas leakage
Source(s): MY CHEM KNOWLEDGE