Q1

The Use an Object action says "When an object requires your action for its use, you take the Use an Object action."

Many alchemical or throwable items, like Alchemist's Fire, Acid, and Holy Water, say "As an action, you can throw this flask up to 20 feet" or otherwise specify that you can use them as an action.

The Combat section also notes "You can also interact with one object or feature of the environment for free, during either your move or your action."

Does this mean that any character can attack with Alchemist's Fire, Acid, Holy Water or something with similar verbiage that they have in hand for 'free' on their turn?