List of top Chemistry Questions on Aldehydes And Ketones asked in Bihar Board XII

The general formula of carbonyl compound is:
At room temperature, formaldehyde is
The IUPAC name of CH$_3$-CH-CH$_3$-CH$_2$Cl is
How would you distinguish between the following compounds by chemical tests?
(i) Formaldehyde and Acetaldehyde
(ii) Acetaldehyde and Acetone
Which of the following is Tollen's reagent?