Question

1) is aldehyde aliphatic or aromatic ?
2) is aldehyde acidic or basic on litmus test ?

Answer 1

1) aldehyde is aliphatic

2) aldehyde is neutral... it doesn't show any colour change on litmus paper...

Answer 2

Aromatic aldehydes are organic molecules having an aromatic group attached to their functional group (–CHO).

Aliphatic aldehydes are organic compounds that have no aromatic rings attached to the aldehyde group or anywhere in the compound.