Chapter 19, Problem 1SAQ

Interpretation Introduction

Interpretation: The compound which is carbohydrate is to be determined.

Concept Introduction: Carbohydrates are the compounds composed of carbon, hydrogen and oxygen.

They are represented by general formula that is $\left({\text{CH}}_2\text{O}\right)$.

Carbohydrates can be identified as ketone or aldehyde molecule, which contains several hydroxyl groups $\left(-\text{OH}\right)$.

Answer to Problem 1SAQ

Correct answer: Option (a) is correct.

Explanation of Solution

Reason for the correct option: The structure is:

The above structure contains multiple hydroxyl groups and has formula ${\text{C}}_5{\text{H}}_{10}{\text{O}}_5$. Its formula follows the general formula of carbohydrate.

Reasons for the incorrect options: Option (b) is incorrect because according to its structure, it cannot be represented by general formula of carbohydrate due to presence of $-{\text{NH}}_2$ group.

Option (c) is incorrect due to absence of hydroxyl group and it cannot be represented by general formula of carbohydrate.

Option (d) is incorrect because according to its structure, it cannot be represented by general formula of carbohydrate.

Hence, options (b), (c) and (d) are incorrect.