The number of lone pair$(s)$ of electrons on the central atom and the shape of the $BrF_{3}$ molecule,respectively,are ..... .

$A$ pair of molecules with see-saw shape and linear shape,respectively,is

In molecules of the type $AX_2L_n$ (where $L$ represents lone pairs and $n$ is its number),there exists a bond between element $A$ and $X$. The $\angle XAX$ bond angle:

Describe the difference in the structures of $PCl_5$ and $PCl_3$.

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:

The $H-N-H$ bond angle in $NH_{3}$ molecule is