Benzene reacts with CH₃Cl in the presence of anhydrous AlCl₃ to form:

$\mathrm{Ethyne} \stackrel{?}{\to }$ $\mathrm{Benzene}$ 

The reagent used in the above conversion is:

1. Cr₂O₃

2. Alc. KOH

3. Red hot Fe

4. NaNH₂/liq.NH₃

The reaction of toluene with Cl₂ in presence of FeCl₃ gives ‘X' and the reaction in presence of light gives 'Y'. 'X' and 'Y' are respectively:

RCOCl and ${\mathrm{AlCl}}_3$ are used in the Friedel-Crafts reaction.
The electrophile among the following is:

1. ${\mathrm{Cl}}^{+}$                                       

2. RCOCl

3. $\mathrm{R}\stackrel{+}{\mathrm{C}}$O                                     

4. ${\mathrm{R}}^{+}$

Product (B) in the above mentioned reaction is-

1.		2.
3.		4.

Nitrobenzene on reaction with conc. HNO₃/H₂SO₄ at 80-100$°$C forms -

1. 1,2-Dinitrobenzene

2. 1,3-Dinitrobenzene

3. 1,4-Dinitrobenzene

4. 1,2,4-Trinitrobenzene

The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reaction is:

The compound among the following that undergoes bromination of its aromatic ring

(electrophilic aromatic substitution) at the fastest rate is-

1.		2.
3.		4.