MCQ
When conc. ${H_2}S{O_4}$ comes in contact with sugar, it becomes black due to
- AHydrolysis
- BHydration
- CDecolourisation
- ✓Dehydration
✓
Answer
Correct option: D.
Dehydration
d
The sugar, a carbohydrate such as $C _6 H _{12} O _8$, is mixed with the sulfuric acid, $H _2 SO _4$. The sulfuric acid dehydrates the carbohydrate removing water and leaving behind carbon. The hot steam creates bubbles in the carbon making a carbon foam.
The sugar, a carbohydrate such as $C _6 H _{12} O _8$, is mixed with the sulfuric acid, $H _2 SO _4$. The sulfuric acid dehydrates the carbohydrate removing water and leaving behind carbon. The hot steam creates bubbles in the carbon making a carbon foam.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
When primary amine is heated with $C{S_2}$ in presence of excess mercuric chloride, it gives isothiocyanate. This reaction is called
→Which of the following contain maximum number of carbon atoms?
The first ionization energy of boron is less than that of beryllium because
Which one of the following compound is most basic ?
If the electron pair forming a bond between two atoms $A$ and $B$ is not in the centre, then the bond is
→An electronic transition from $1s$ orbital of an atom causes
→For the reaction$A(g) + 3B(g) \rightleftharpoons 2C(g)$ at $27\,^oC$, $2\, moles$ of $ A$, $4\, moles$ of $B$ and $6\, moles$ of $C$ are present in a $2\, litre$ vessel. If $K_C$ for the reaction is $1.2$, the reaction will proceed in
→Aromatic properties of benzene are proved by
Which of the following alcohol can not be prepared by the reaction of acid chloride with excess of Grignard reagent followed by acidification ?
The chemical system that is non-aromatic is