Haloalkanes and Haloarenes

Reactivity towards AgNO? depend on stability of carbocation formed

$P_{\text{gas}}=\frac{{\mathbf{n}}_{\text{gas}}RT}{V}$

as $n,T$ & $V$  constant So

${\mathrm{P}}_{{\mathrm{H}}_2}={\mathrm{P}}_{{\mathrm{O}}_2}={\mathrm{P}}_{{\mathrm{H}}_{\theta }}=2\mathrm{a}\mathrm{t}\mathrm{m}$

So, ${\mathrm{P}}_{\text{Total}}={\mathrm{P}}_{{\mathrm{H}}_2}+{\mathrm{P}}_{{\mathrm{O}}_2}+{\mathrm{P}}_{\mathrm{H}\mathrm{e}}=6\mathrm{a}\mathrm{t}\mathrm{m}$   

Kindly consider the following Image 

Above reaction is S?1 reaction as it proceed via formation of carbocation. Polar solvent is more suitable for S?1 and racemisation takes place.

E2 elimination. Most acidic proton is removed. Fluorine is more electronegative.

Reaction (1) is SN1 (rate independent of [OH? ]). Reaction (2) is E2 (rate depends on [OH? ]).
Statement (B) is correct. Changing concentration of base will have no effect on reaction (1).