Sort the compounds: conjugated or non conjugated. -but-2-enoic acid -butanoic acid -hex-4-en-3-one -hexan-3-one

But-2-enoic acid and Hex-4-en-3-one are conjugated.

Butanoic acid and Hexan-3-one is non conjugated.

Explanation:

1) Conjugated means system where double bond is present at alternative position separated by single bonds. Conjugation of electrons is present.

But-2-enoic acid is conjugated compound because double bond present at the second carbon is in conjugation with (C=O) bond of carboxylic acid

hex-4-en-3-one are conjugated because double bond present at the forth carbon is in conjugation with third carbon at which oxygen is double bonded.

2) Non conjugated means system where double bonds are not present at alternative position or double bonds are completely absent.

Butanoic acid and Hexan-3-one is non conjugated because conjugation of electrons is absent both the compounds.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the answer would be b i believe