Complete the following:
a. `2PhCHO+NH_(2)NH_(2)rarr`
b. Reduction of PhCHO with the following:
i. Tollens reagent
ii. `Zn//HCl`
iii. LAH
iv. Clemmensen's reduction `(Zn(Hg)//conc. HCl)`
v. Wolff-Kishner reduction `(NH_(2)NH_(2)+Glycol+overset(Θ)(OH))`
vi. Two moles of PhCHO with Zn + HCl

Explanation

a.
b. i. `PhCOOH` ii. `PhCH_(2)OH` iii. `PhCH_(2)OH`
iv. `PhCH_(3)` v. `PHCH_(3)`
vi.