Which of the following molecules is linear and possesses the maximum number of lone pairs on the central atom?

Which of the following substances has the minimum bond angle?

Given below are two statements:
Statement $(I) :$ For $ClF_3$,all three possible structures may be drawn as follows:
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Statement $(II) :$ Structure $III$ is most stable,as the orbitals having the lone pairs are axial,where the $\ell p-bp$ repulsion is minimum.
In the light of the above statements,choose the most appropriate answer from the options given below:

What is the shape of the $SO_2$ molecule?

Group the following as linear and non-linear molecules: $H_2O$,$HOCl$,$BeCl_2$,$Cl_2O$.

In the $NO_3^-$ ion,what are the number of bond pairs and lone pairs of electrons,respectively?