Which one is the weakest base?

Aniline reacts with excess $Br_2 / H_2O$ to give the major product.

The correct order of increasing basic nature for the bases $NH_3$,$CH_3NH_2$ and $(CH_3)_2NH$ is

The above $(C-N)$ coupling reaction takes place at

Identify the products $y$ and $x$ in the following reaction sequence:
$C_6H_5CONH_2 \xrightarrow{NaOBr} y$
$C_6H_5CONH_2 \xrightarrow[(ii) H_3O^+]{(i) C_6H_5SO_2Cl / py, \Delta} x$

On hydrolysis of a "compound",two compounds are obtained. One of which on treatment with sodium nitrite and hydrochloric acid gives a product which does not respond to iodoform test. The second one reduces Tollens reagent and Fehling's solution. The "compound" is