The reaction among the following that proceeds through an electrophilic substitution reaction is:

1.
2.
3.

4.

In the following reaction,

\( CH_{3}C\equiv CH\xrightarrow[Red \ hot \ iron \ tube]{873 K} \ A\)

The number of ($\sigma$) bonds present in the product (A) is:

1. 21 

2. 9

3. 24

4. 18

 
P, Q, and R in the above-mentioned sequence of reactions are respectively:

1.
2.
3.
4.

 A compound that cannot give Friedel-Craft’s reaction is: 

The order of decreasing reactivity towards an electrophilic reagent, for the following: 
(i) Benzene (ii) Toluene 
(iii) Chlorobenzene and 
(iv) Phenol 

would be:

1. (i) > (ii) > (iii) > (iv)

2. (ii) > (iv) > (i) > (iii)

3. (iv) > (iii) > (ii) > (i)

4. (iv) > (ii) > (i) > (iii)

The increasing order of electrophilic substitution for the following compounds is:

In Friedel craft reaction, Toluene can be prepared by:

1. C₆H₆ + CH₃Cl

2. C₆H₅Cl + CH₄

3. C₆H₆ + CH₂Cl₂

4. C₆H₆ + CH₃COCl

Which of the following is not the characteristic of arenes:
1. More stability
2. Resonance
3. Delocalization of π electrons
4. Electrophilic addition