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

$\mathrm{Ethyne}<mspace\; width="1em"></mspace>\stackrel{?}{\to }$ $\mathrm{Benzene}$ 

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. ${\mathrm{R}}^{+}$

The 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

Arrange the following compounds in increasing order of their reactivity toward electrophilic aromatic substitution reactions.

Which of the following compounds undergoes bromination of its aromatic ring (electrophilic aromatic substitution) at the fastest rate?

1.		2.
3.		4.