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.

Out of benzene, m-dinitrobenzene, and toluene, the one that will undergo nitration most easily is :

Lewis acid(s) that can be used during the ethylation of benzene is/are:

The IUPAC names of the following compounds are?

(a) CH3CH=C(CH3)2

(b) CH2=CH-C≡C-CH3

(c)

(d)

(e)

(g) CH3 – CH = CH – CH2 – CH = CH – CH – CH2 – CH = CH2

                                                                  |

                                                             C2H5

1.  2-Methylbut-2-ene, Pen-1-ene-3-yne, 1, 3-Butadiene, 4-Phenyl but-1-ene , 2-Methyl phenol, 5-(2-Methylpropyl)-decane and 4-Ethyldeca-1, 5, 8-triene

2. 4-Phenyl but-1-ene, Pen-1-ene-3-yne, 1, 3-Butadiene, 2-Methylbut-2-ene, Pen-1-ene-3-yne, 2-Methyl phenol, 5-(2-Methylpropyl)-decane and 4-Ethyldeca-1, 5, 8-triene

3. 2-Methylbut-2-ene, 4-Phenyl but-1-ene, 1, 3-Butadiene, Pen-1-ene-3-yne, 2-Methyl phenol, 5-(2-Methylpropyl)-decane and 4-Ethyldeca-1, 5, 8-triene

4. 4-Ethyldeca-1, 5, 8-triene, Pen-1-ene-3-yne, 1, 3-Butadiene, 4-Phenyl but-1-ene, 2-Methyl phenol, 5-(2-Methylpropyl)-decane and 2-Methylbut-2-ene

The numbers of structural isomers of ${\mathrm{C}}_4{\mathrm{H}}_8$ (with one double bond) and ${\mathrm{C}}_5{\mathrm{H}}_8$ (with one triple bond) are:
1. \(\mathrm{C}_4 \mathrm{H}_8=3 ; \mathrm{C}_5 \mathrm{H}_8=3 \)
2. \(\mathrm{C}_4 \mathrm{H}_8=4 ; \mathrm{C}_5 \mathrm{H}_8=4 \)
3. \(\mathrm{C}_4 \mathrm{H}_8=3 ; \mathrm{C}_5 \mathrm{H}_8=4\)
4. \(\mathrm{C}_4 \mathrm{H}_8=4 ; \mathrm{C}_5 \mathrm{H}_8=3\)

Which of the following is the correct balanced chemical equation for the combustion of butane?

The dihedral angle of the least stable conformer of ethane is: