Niranjan Barla’s Chemistry Questions
On 19th Feb, 2010, Niranjan Barla sent these questions:
Can u plz answer this ques??
1. The wooden shelves on which conc.Sulphuric Acid bottles are kept are
stained black. Why?
2. Dot diag. of ethyne.
Conc. Sulphuric acid has a very strong affinity for water, which is the reason behind its dehydrating property. It reacts with wood (which is a type of cellulose) to dehydrate it (remove the molecules of water from the wood), leaving behind a layer of carbon, which causes the black stain on the wooden shelves on which it is kept.
[C6H5O10]n ———- 6[C]n + 5[H2O]n
Dot diagram of ethyne