What is the shape of the $SF_3Cl_3$ molecule?

The correct stability order of the following diazonium salts is:

Arrange $CCl_4, AlCl_3, PCl_5$ and $SiCl_4$ in the order of their ease of hydrolysis.

At constant pressure,the volume of a fixed mass of a gas varies as a function of temperature as shown in the graph. The volume of the gas at $300^{\circ}C$ is larger than that at $0^{\circ}C$ by a factor of:

The pair of lines joining the origin to the points of intersection of the line $x-y=2$ with the curve $5x^2+12xy-8y^2+8x-4y+12=0$ are equally inclined to the pair of lines

The circumcentre of the triangle with vertices at $(-2, 3)$,$(1, -2)$ and $(2, 1)$ is