Question

The products of the below reaction is/are:
${C_{12}}{H_{22}}{O_{11}} + conc.{H_2}S{O_4} \to$
(A) $C{O_2} + {H_2}O +$ glucose
(B) Carbon and water
(C) Fructose $+ C{O_2} + {H_2}O$
(D) None of the above

Answer 1

Hint : Carbohydrates are sugar molecules consisting of mainly carbon, hydrogen and oxygen atoms. Carbohydrates are mainly classified into three types. Sucrose is an oligosaccharide and is known as disaccharide. On treatment of sucrose with concentrated sulphuric acid carbon and water were formed.

Complete Step By Step Answer:
Chemical compounds are different types. Carbohydrates are the essential nutrients to the body. Carbohydrates mainly contain carbon, hydrogen and oxygen atoms. These carbohydrates are sugar molecules. The general molecular formula of carbohydrates is ${C_x}{\left( {{H_2}O} \right)_y}$ , where x and y are the number of carbon atoms and y is the sum of the number of hydrogen and oxygen atoms.
Simply, carbohydrates are known as hydrates of carbon. Carbohydrates are classified into three types based on the number of monosaccharides units.
Sucrose is a disaccharide as it gives two monosaccharides’ units upon hydrolysis. The molecular formula of sucrose is ${C_{12}}{H_{22}}{O_{11}}$ .
Concentrated sulphuric acid added to sucrose the following chemical reaction takes place:
${C_{12}}{H_{22}}{O_{11}} + conc.{H_2}S{O_4} \to 12C + 11{H_2}O$
Thus, the products obtained are carbon and water.
The carbon is generally obtained as the product in the chemical reaction of burning of woods and remains as ash.
Option B is the correct one.

Note :
Monosaccharides contain only one simple unit and further do not undergo hydrolysis to form a simple sugar. Oligosaccharides give monosaccharides from two to ten in number upon hydrolysis. Polysaccharides give a large number of monosaccharide units on hydrolysis forms multiple monosaccharide units.