The IUPAC name of Acrolein is:A ) but-2-enalB ) prop-2-enal C ) but-3-enal D ) 2-methyl prop-2-enal

To determine the IUPAC name of Acrolein, we need to break down its structure and then apply the rules for naming organic compounds according to IUPAC conventions. Acrolein is a simple organic molecule with the following structure:

Structure of Acrolein:

It has a three-carbon chain.
There is an aldehyde group (-CHO) attached to the end of the chain.
There is a double bond between the first and second carbons.
Here’s how you would name it:

Identify the longest carbon chain containing the aldehyde group:

The longest chain with the aldehyde group has three carbons.
Determine the position of the double bond:

The double bond is between the first and second carbons in the chain.
Name the chain based on the longest chain with the aldehyde:

Since the longest chain has three carbons, it’s a propanal (prop-anal). However, since there's a double bond, it becomes prop-2-enal.
So the correct IUPAC name of Acrolein is B) prop-2-enal.