C-Cl bond has partial double bondcharacter in

In which of the following case central atom-F bond has partial double bond character?

Assertion: Aryl undergoes nucleophilic substitution with ease Reason The carbon halogen bond in aryl halides has partial double bond character .

Assertion : Aryl halides undergo nucleophilic substitution with ease Reason : Carbon-halogen bond in aryl halides has partial double bond character.

In a substance that are resonance hybirds, the measured length of given bond usually differs form that predicted form any one of the contributing sturctures. Chloroethylene is found by measurement to have a C-Cl distance of 1.69A. This is shorter than C-Cl bond in such compounds a methly chloride (1.77A), an indication that in chloroethylene C-Cl bond has some double bond character. Which of the following has shortest C-Cl bond?

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease. Reason:The carbon halogen bond in aryl halides has partial double bonds character.

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease. Reason:The carbon halogen bond in aryl halides has partial double bonds character.

Assertion (A) : It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chlorobenzene in comaparision to that in chloroethane. Reason (R) : Chlorine-carbon (C-Cl) bond in chlorobenzene has partial double bond character due to resonance.