Which of the following compounds will give a silver mirror test with ammoniacal silver nitrate (Tollens' reagent)?
$(A)$ Formic acid
$(B)$ Formaldehyde
$(C)$ Benzaldehyde
$(D)$ Acetone
Choose the correct answer from the options given below:

Identify $X, Y, Z$ in the following reaction sequence:

Which statement about the aldol condensation is correct?

Given below are two statements :
Statement $I :$ The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement $II :$ The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements,choose the most appropriate answer from the options given below :

Which of the following gives the iodoform test?

Write a note on addition compounds of alcohol in aldehyde and ketone. $OR$ What are hemiacetal,acetal and ketal compounds? Give examples.