Identify the correct order of the priority of the following...

Identify the correct order of the priority of the following functional group.

Options

A $-\text{COCl} > -\text{CHO} > \text{C}=\text{C} > -\text{C}\equiv\text{C}-$
B $-\text{CHO} > -\text{COCl} > \text{C}=\text{C} > -\text{C}\equiv\text{C}-$
C $\text{C}=\text{C} > -\text{CHO} > -\text{COCl} > -\text{C}\equiv\text{C}-$
D $-\text{C}\equiv\text{C}- > \text{C}=\text{C} > -\text{CHO} > -\text{COCl}$

Correct answer

A. $-\text{COCl} > -\text{CHO} > \text{C}=\text{C} > -\text{C}\equiv\text{C}-$

Step-by-step solution

According to IUPAC nomenclature rules, the priority order of principal functional groups is:

Carboxylic acids > Acid anhydrides > Esters > Acid chlorides > Amides > Nitriles > Aldehydes > Ketones > Alcohols > Amines > Alkenes > Alkynes.

Therefore, the correct order of priority for the given functional groups is:

-\text{COCl} > -\text{CHO} > \text{C}=\text{C} > -\text{C}\equiv\text{C}-

Answer:

-\text{COCl} > -\text{CHO} > \text{C}=\text{C} > -\text{C}\equiv\text{C}-

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