Base-catalyzed aldol condensation occurs with:

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:

Which one is used in the manufacture of mirrors?

The number of aldehydes that undergo Cannizzaro reaction from the following are Phenyl ethanal,Methanal,$2-$Methoxy propanal,Trichloro ethanal.

Consider the following sequence of reactions:
Ketone $A$ $\xrightarrow[2. H_2O]{1. C_2H_5MgBr} B$ $\xrightarrow[- H_2O]{H_2SO_4, \text{Heat}} C$ $\xrightarrow[2. Zn, H_2O]{1. O_3} \text{Propanone} + \text{Acetaldehyde}$
The ketone $A$ is:

$Ph-CO-CHO \xrightarrow[\Delta]{conc. NaOH} \text{Product}$