How does acetaldehyde react with $\mathrm{HCN}$?

How does acetaldehyde react with ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{MgBr}$?

Write chemical equations for reaction of acetaldehyde with ammoniacal ${\mathrm{AgNO}}_3$.

Write the chemical equation for the reaction of acetaldehyde with ${\mathrm{NH}}_2\mathrm{OH}$.

Write chemical equations for reaction of acetaldehyde with $\mathrm{HCN}$.

How will you account for the following?

Formaldehyde gives Cannizzaro's reaction, but acetaldehyde does not.

How will you account for the following :

During preparation of ammonia derivatives from aldehydes and ketones, $\mathrm{pH}$ of the reaction is carefully controlled.

How will you account for the following :

To illustrate cross aldol condensation, write one chemical equation.

Complete the following equations giving the names of the reactants and the products :

${\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2\mathrm{Ca}\stackrel{\Delta }{⟶}$