Which of the following reactions, in the presence of anhydrous AlCl₃, leads to the formation of ethylbenzene (Ph–Et)?

1. ${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2+{\mathrm{C}}_6{\mathrm{H}}_6$

2. ${\mathrm{H}}_2\mathrm{C}={\mathrm{CH}}_2+{\mathrm{C}}_6{\mathrm{H}}_6$

3. ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_3+{\mathrm{C}}_6{\mathrm{H}}_6$

4. ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2\mathrm{OH}+{\mathrm{C}}_6{\mathrm{H}}_6$

The molecular formula of diphenylmethane is C₁₃H₁₂. find out the number of structural isomers possible when one of the hydrogens is replaced by a chlorine atom:

On ozonolysis, the alkene that gives the following product is:

1.
2.	\(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CHCH}_2 \mathrm{CH}_3\)
3.	\(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CHCH}_3\)
4.

A compound possessing optical isomerism provided it has the molecular formula C₇H₁₆, would be:

The compound  on reaction with NaIO₄ in the presence of KMnO₄ gives:

1. CH₃COCH₃

2. CH₃COCH₃ + CH₃COOH

3. CH₃COCH₃ + CH₃CHO

4. CH₃CHO + CO₂

Among the following, the correct example of a free-radical substitution reaction is:

1.
2.
3.
4.

 An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one.
The IUPAC name of ‘A’ is :

1. 3-Ethylpent-2-ene

2. 3-Ethylpent-2- yne

3. 2-Ethylpent-3-ene

4. 3-Ethylpent-4-yne

An alkene ‘A’ contains 3 C – Cσ bonds, 8 C – H σ bonds, and 1 C – C π bond,

 ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. The IUPAC name of ‘A’ is:

Propanal and pentane-3-one are the products of ozonolysis of an alkene. The structural formula of the alkene is  :

1.		2.	,
3.		4.

Benzene is extraordinarily stable, though it contains three double bonds, because of :

1. Delocalized protons

2. Delocalized neutrons

3. Resonance

4. None of the above.