Chapter 21, Problem 28A

Interpretation Introduction

Interpretation:

This is to be explained that sugar is referred to as polyhydroxy carbonyl compounds.

Concept introduction:

Carbohydrate- Carbohydrates are the naturally occurring organic compound. It consists of carbon, hydrogen, and oxygen. There are aldehyde, ketone, and polyhydroxy groups present. The carbonyl group is present in aldehyde, ketone, and alcohol group present as a polyhydroxy group.

Answer to Problem 28A

The functional group carbonyl present in the sugar as aldehyde and ketone form and the alcohol group is present in a larger number so it is termed as polyhydroxy.

Explanation of Solution

The simple sugars are classified as monosaccharides contains six-carbon. In the given structure the carbon mark from 2 to 6 is representing the hydroxy group. When more than three alcohol group present in the same structure is termed as polyhydroxy, and at 1 carbon is representing the aldehyde group in the glucose sugar, which is representing the carbonyl group.

Conclusion

The sugar structures are different due to the presence of carbonyl group as aldehyde and ketone group, but they contain the hydroxyl group more than three so it is termed as a polyhydroxy group.