Carbylamine is liberated when $.....$ is heated with chloroform and alcoholic potash.

The chemical reaction shown in the image represents the reduction of a diazonium salt to an aromatic hydrocarbon. Identify the reagent typically used for this transformation.

Predict the major product $(A)$ for the following reaction:

The correct increasing order of basic strength for the following compounds is:

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

The gas evolved when ethyl amine reacts with sodium metal is