Chapter 16, Problem 16.1EP

Interpretation Introduction

Interpretation:

The compounds in which carboxyl group is present has to be chosen from the given options.

Concept Introduction:

Carbonyl groups are the one which contain a double bond between carbon and oxygen atom.  Aldehydes and ketones possess this carbonyl functional group in it.  The structural representation of a carbonyl group can be given as shown below,

If a hydroxyl group is attached to a carbonyl group means it is known as carboxyl group.  This can be represented as shown below,

Answer to Problem 16.1EP

Compounds that contain carboxyl groups are option (a) and option (d).

Explanation of Solution

Reason for correct option:

Carboxylic acid is a class of organic compound that contain carbonyl group in it.  The functional group of carboxylic acid is the carbonyl group attached to a hydroxyl group.

This group is also known as carboxyl group.  Among the given compounds in the problem statement, there are only two compounds that contain the carboxyl group.  They are shown below,

Hence, the correct options are option (a) and option (d).

Reason for incorrect option:

Compound given in option (b) is,

This does not contain the carboxyl group.  This is a carboxylic acid derivative namely, ester.  Hence, option (b) is an incorrect one.

Compound given in option (c) is,

This does not contain the carboxyl group.  This is a carbonyl compound.  Hence, option (c) is an incorrect one.

Therefore, option (b), and option (c) are incorrect one.

Conclusion

The correct option among the given options is identified as option (a) and option (d).