In our chemistry books (like Concise Chemistry), it is given that concentrated sulphuric acid is used to dry $\ce{HCl}$ gas. But, concentrated sulphuric acid is a strong oxidising agent so, why isn't $\ce{HCl}$ gas oxidised to $\ce{H2O}$ and chlorine gas? Why dry $\ce{CaCl2}$ (Calcium Chloride)...

I have seen such avatars used by particularly low rep users a lot Seems like these are nerds, and they've well conceived how to attract attention from other nerds. I don't actually know what I really want to ask about such things here. But though I'm gonna try How should we handle that (out...

I think it should be called "Reversal!" With only 187 of these things in circulation, I think it could use the emphasis that it's an amazing occurrence.

I have a David vs Goliath case here involving a teen moderator on Stack Overflow. His display name is BoltClock. I'm a low reputation SO user (less than 150 points) who was recently suspended for Voting Irregularities by BoltClock. Eventually the mistake was corrected by another non-teen moderat...

I signed up but I'm afraid because all my passwords are the same. Can moderators see our passwords in Stack Overflow? Please don't hack me.

Does vinyl or secondary butyl have higher priority, and why? According to my textbook, vinyl has higher priority than isopropyl, because an atom which is connected by a double bond can be treated as two identical atoms(one of them is just an imaginary atom). How about vinyl and secondary butyl? S...

In a question on Meta Stack Exchange, I found out that a user loses 1 reputation when downvoting an answer. This is a feature introduced to the Stack Exchange communities so that downvoting is discouraged. It would be rather more convenient to ignore the answer or asker the user who answered to p...

I have seen some Question/Answers which get annihilated with down votes in a couple of seconds, after a quick edit the Question/Answer then begins to make sense and is a valid Question/Answer where the user is seeking help or trying to provide an answer. Is it possible to flag a Question/Answer ...

I have tried mails to self and text files to keeping notes in one place, which I can reuse. However I have found them getting lost as time passes by. The "Answer your own question" in Stack Exchange is good way of keeping notes to self. However if the question is simple e.g. "how to do something"...

No more re-typing the same comments over and over! This script adds a little 'auto' link next to all comments boxes. When you click the link, you see a popup with 6 configurable auto-comments (canned responses), which you can easily click to insert. This script was inspired by answers to thi...