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

1.	60°	2.	0°
3.	120°	4.	180°

The major product of the following chemical reaction is:

1.
2.
3.
4.

Reactant A in the following reaction is:

A  + NaOH \(\xrightarrow[\Delta ]{CaO}\) CH₃CH₂CH₃ + Na₂CO₃

1. Sodium ethanoate

2. Sodium propanoate

3. Sodium butanoate

4. Sodium methanoate

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

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. \(\mathrm{C}_4 \mathrm{H}_8=4 ; \mathrm{C}_5 \mathrm{H}_8=3\)

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

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

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

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.

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

1.		2.	,
3.		4.