The correct statement regarding electrophile is -­

1. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

2. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

3. Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile

4. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile

The most stable carbanion species among the following is-

1. $C{{\mathrm{Cl}}_3}^{-}$

2. ${{{\mathrm{CH}}_3}^{-}}_{}$

3. ${\mathrm{CH}}_2{\mathrm{Cl}}^{-}$

4. ${{\mathrm{CHCl}}_2}^{-}$

The incorrect statement among the following for a nucleophile is-

1. Nucleophile is a Lewis acid

2. Ammonia is a nucleophile

3. Nucleophiles attack low electron density sites

4. Nucleophiles are not electron seeking

An electrophile among the following is -

1. ${\mathrm{OH}}^{-}$

2. ${\mathrm{NC}}^{-}$

3. $R_3{C}^{-}$

4. Carbonyl group

Electrophilic addition reactions proceed in two steps. The first step involves the addition of an electrophile. The major intermediate formed in the first step is -

${\mathrm{H}}_3\mathrm{C}-\mathrm{HC}={\mathrm{CH}}_2+{\mathrm{H}}^{+}\to$?

1. $2°$ carbanion

2. $1°$ carbocation

3. $2°$ carbocation

4. $1°$ carbanion

The correct order of the ability of the leaving group is

1.  ${\mathrm{OCOC}}_2{\mathrm{H}}_5>{\mathrm{OC}}_2{\mathrm{H}}_5>{\mathrm{OSO}}_2\mathrm{Et}>O{\mathrm{SO}}_2{\mathrm{CF}}_3$

2.  ${\mathrm{OC}}_2{\mathrm{H}}_5>{\mathrm{OCOC}}_2{\mathrm{H}}_5>O{\mathrm{SO}}_2{\mathrm{CF}}_3>O{\mathrm{SO}}_2\mathrm{Me}$

3.  ${\mathrm{OSO}}_2{\mathrm{CF}}_3>{\mathrm{OSO}}_2\mathrm{Me}>{\mathrm{OCOC}}_2{\mathrm{H}}_5>{\mathrm{OC}}_2{\mathrm{H}}_5$

4.  ${\mathrm{OCOC}}_2{\mathrm{H}}_5>{\mathrm{OSO}}_3{\mathrm{CF}}_3>{\mathrm{OC}}_2{\mathrm{H}}_5>{\mathrm{OSO}}_2\mathrm{Me}$

The species among the following that is not an electrophile is -

1. $B{H}_3$

2. $H_3\stackrel{\oplus }{O}$

3. $\stackrel{\oplus }{N}{O}_2$

4. $\stackrel{\oplus }{Cl}$

Chlorine atom can be classified as -

1. Carbocation

2. Nucleophile

3. Electrophile

4. Carbanion

The addition of HCl to an alkene proceeds in two steps. The first step is the attack of H⁺ ion on the double bond portion. The same can be shown as -

1.    

2.  

3.   

4.  All of these are possible