H2, Pd/C

Lindlar's catalyst

Sodium in liquid ammonia (Na/NH3)

H2, Pt

An electrophile

A nucleophile

A homolytic reagent

A base

Heterolytic fission

Homolytic fission

Both (a) and (b)

None of these

$OH^-$

$CN^-$

$NH_3$

$BF_3$

Cl-

R+

AlCl4-

RCl

Higher electronegativity increases nucleophilicity.

Nucleophilicity is the kinetic tendency to react with an electrophile.

A negative charge generally increases nucleophilicity.

Steric hindrance decreases nucleophilicity.

C>B>A

B>C>A

A>C>B

A>B>C

${{\rm{C}}_2}{{\rm{H}}_5}{\rm{SH}}$

${\rm{C}}{{\rm{H}}_3}{\rm{CO}}{{\rm{O}}^ - }$

${\rm{C}}{{\rm{H}}_3}{\rm{N}}{{\rm{H}}_2}$

${\rm{NCCH}}_2^ -$

Nucleophilic substitution reaction

Elimination reaction

Both nucleophilic substitution and elimination reaction

Rearrangement

${\rm{B}}{{\rm{F}}_3}$

${\rm{N}}{{\rm{H}}_3}$

${\rm{C}}{{\rm{N}}^ - }$

${\rm{O}}{{\rm{H}}^ - }$

${\rm{B}}{{\rm{F}}_3}$

${\rm{FeC}}{{\rm{l}}_3}$

${\rm{ZnC}}{{\rm{l}}_2}$

${{\rm{C}}_2}{{\rm{H}}_5}{\rm{MgBr}}$