Question

Select one or more than one statement for 2-ethyl-3 iodopentanoic acid.
A) The parent name is 3-iodopentanoic acid
B) It has two ethyl and three iodo groups
C) It has only one halogen and only one methyl group
d) it belongs to carboxylic acid functional group as ending is -oic
e) it contains a total of seven carbon atoms.

Answer 1

We need to know that by looking at the chemical name which is given in the question, we can identify the functional groups and also extra atoms other than carbon atoms if present. The parent atom in this compound is pentatonic acid.

Complete answer:
Before solving this question we need to know the exact structure of 2-ethyl-3 iodopentanoic acid first. This will lead us in solving this question and neglect the wrong options. The molecular formula for this compound is

Option A) This is an incorrect option as probably the parent name is not 3-iodopentanoic acid. this compound is a derivative of pentatonic acid.
Option B) this is incorrect option as it does not contain two ethyl and three iodo groups. 2-ethyl-3 iodopentanoic this compound has 2 ethyl groups and three iodine atoms, thus this is a wrong option.
Option C)this is an incorrect option as this compound contains two methyl groups thus this option is not right as it said it has two methyl groups.
Option D) This option is correct as this compound contains carboxylic acid functional group also the ending in the formula is oic. Thus this can be one of the correct options.
Option E) This option is correct as this compound contains seven carbon atoms as we look at the structure we can identify and can see the number of carbon atoms.

The correct answer is option d) and e).

Note:
We need to know that the parent atom in this compound is pentatonic acid. By looking at the name of the compound we can look for the functional groups which are present. In total there are seven carbon atoms out of which five in the main chain and the other two inside the carbon chain.