Haloalkanes and Haloarenes

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).

Reaction path is SN2 because OH? is strong nucleophile, but hydroxyl ion will not attack on chiral centres and so there is retension of configuration.

Kindly consider the following Image

Δng=-1/2. Kp=Kc (RT)? ¹/². Kc=Kp (RT)¹/².

Is bulky base, so elimination is dominating.