How SnCl₂ is angular in shape............................................?

Dear student,
Sn has 4 valence electron 5s²5p²(group 14 element, below carbon).
two of its valence electron forms bond with 2 chlorine atoms
and remaining 2 are called lone pair electrons.
According to VSEPR theory lone pair electron repels bond pair electrons, just like we press a tong,. and structure moves fron ideal linear to somewhat angular structure