Formalin is an aqueous solution of

State True or False for the following statements:
$(i)$ Acetone is a propanone and there is an amide group in it.
$(ii)$ Acetone is dimethyl ketone.
$(iii)$ The formula of acetone is $CH_3COCH_3$.
$(iv)$ Acetone possesses a carbonyl group.

The structures of cinnamaldehyde $(I)$,salicylaldehyde $(II)$,and vanillin $(III)$ are:

Which structure represents $3-$methyl$-2-$pentanone?

What is the physical state of formaldehyde at room temperature?

Which of the following is correctly matched according to their common names?