Firstly, Black hole's gravity will cause complete chaos in our Solar System. Orbits of Planets as well as Comets will be significantly altered. Initially comets and meteorites might start hurtling towards us. Later even the planets might start colliding with each other. Secondly, even if a gigantic planet like Jupiter comes in the path of the Black hole it will be devoured. Thirdly, if the Black hole comes near Earth, initially its intense gravitational pull will cause devastating earthquakes and volcanoes. When the Black hole reaches our orbit there will be nothing left but an uninhabitable magma-laden rock. Lastly, our Sun might offer some resistance to start with. A gravitational tug of war might ensue. But eventually even our beloved Sun will be ripped apart to pieces.