$- N{O_2}$

$- N{H_2}$

$- OH$

$- Cl$

2nd carbon atom

1st carbon atom

3rd carbon atom

None of these

${{\rm{C}}_6}{{\rm{H}}_5}-$

$-{\rm{H}}$

${\rm{C}}{{\rm{H}}_3}-$

${\rm{Cl}}-$

Cl

Cl+

Cl-

They have the same electronegativity.

A bruised knee

A broken bone

A learned skill

A sunburn

0.1 M difluoroacetic acid

0.1 M fluoroacetic acid

0.1 M chloroacetic acid

0.1 M acetic acid

Ethyl amine

Ammonia

Dimethyl amine

Methyl amine

$CC{l_3}COOH$

$CHC{l_2}COOH$

$C{H_2}ClCOOH$

$C{H_3}COOH$

Inductive effect

Hyperconjugation effect

Electromeric effect

Mesomeric effect

Delocalisation of $\sigma$ electrons

partial displacement of $\sigma$ electrons

Delocalisation of $\pi$ electrons

Displacement of lone pair

$+ M$ of Ph

$+ I$ of Cl

$+ M$ of Cl

$- I$ of Ph