Ramya added
concentrated
sulphuric acid to a
test tube containing
a bit of table sugar.
She noticed that
they formed a black
mass. What actually
happened?
The sugar
molecules were
oxidised
The sugar
molecules were
reduced
Dehydration of
sugar
took
place
Hydrolysis of
took place
Answers
Answer:
One of the most spectacular chemistry demonstrations is also one of the simplest. It's the dehydration of sugar (sucrose) with sulfuric acid. Basically, all you do to perform this demonstration is put ordinary table sugar in a glass beaker and stir in some concentrated sulfuric acid (you can dampen the sugar with a small volume of water before adding the sulfuric acid). The sulfuric acid removes water from the sugar in a highly exothermic reaction, releasing heat, steam, and sulfur oxide fumes. Aside from the sulfurous odor, the reaction smells a lot like caramel.
The sugar molecules were reduced Dehydration of sugar took place Hydrolysis of took place
Concentrated sulfuric acid can perform a dehydration reaction with table sugar. After mixing, the color changes from white to brownish and eventually to black. ... As the acid dehydrates the sucrose, the water produced will dilute the sulfuric acid, giving out energy in the form of heat.