Statement-1: The hybridization of N atom in acetamide is ${\mathrm{sp}}^3$

Statemeot-2: There occurs delocalization of lone pair of electrons present on N atom.

Statement-1 is False, Because despite being surrounded by four groups, the N atom in ${\mathrm{CH}}_3{\mathrm{CONH}}_2$ (acetamide) is ${\mathrm{sp}}^2$ hybridized.

There occurs delocalization of lone pair of electrons present on N atom. Because electrons get delocalized during conjugation. The stability of the molecule increases with the size of the conjugated system. 

The existence of alternating and bonds in a molecule is known as a conjugated system or conjugated bonds.