What is the role of AlCl₃ in a Friedel-Crafts reaction?

1. Absorbs HCl
2. Releases HCl
3. Generates an electrophile
4. Generates a nucleophile

n-Butylbenzene on oxidation with hot alkaline KMnO₄ gives:

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

1.		2.
3.		4.

Consider the following sequence of reactions.

\(\mathrm{C}_6 \mathrm{H}_6+\mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { heat }]{\mathrm{H}_3 \mathrm{PO}_4} \mathrm{~A} \xrightarrow[2.~ \mathrm{H}_3 \mathrm{O}^{+}, \text {Heat }]{1. ~\mathrm{O}_2 \text { Heat }} \mathrm{B}+\mathrm{C}\)${\mathrm{}}_{}$

The products (B) and (C) are respectively:

1. Benzaldehyde, and acetaldehyde

2. Benzoic acid, and acetic acid

3. Phenol, and propionaldehyde

4. Phenol, and acetone

Consider the following sequence of reactions.

$\underset{{\mathrm{NaHSO}}_3}{\overset{{\mathrm{OsO}}_4}{\to }}$A$\underset{2.<mspace\; width="1em"></mspace>\mathrm{NaOH},<mspace\; width="1em"></mspace>\mathrm{heat}}{\overset{1.<mspace\; width="1em"></mspace>{\mathrm{HIO}}_4}{\to }}$B. The final product (B) is:

1. 

2. 

3. 

4. 

1. ${\mathrm{Cl}}^{\oplus }$

2. Cl^-

3. Cl

4. Cl²⁺

The major product expected from the mono-bromination of phenyl benzoate is:

1.
2.
3.
4.

(A) C₈H₁₀ $\stackrel{{\mathrm{KMnO}}_4}{\to }$ (B)  C₈H₆O₄$\underset{\mathrm{Fe}}{\overset{{\mathrm{Br}}_2}{\to }}$  C₈H₅BrO₄  (C)  (one-product only)

The structure of A in the above-mentioned reaction is-

1.		2.
3.		4.

$\mathrm{Ph}-{\mathrm{CO}}_2\mathrm{H}\stackrel{{\mathrm{SOCl}}_2}{\to }\mathrm{A}\stackrel{{\mathrm{Me}}_2\mathrm{NH}}{\to }\mathrm{B}\stackrel{\left(\mathrm{c}\right)}{\to }\mathrm{Ph}-\mathrm{CHO}$, unknown reagent (c) is:

1. LiALH₄

2. NaBH₄

3. LiAlH₄(t-BuO)₃

4. PCC/CH₂CL₂

The product (B) in the above-mentioned reaction is:

1.		2.
3.		4.