Lewis acid(s) that can be used during the ethylation of benzene is/are:
1. |
|
2. |
|
3. |
|
4. | All of the above |
The numbers of structural isomers of (with one double bond) and (with one triple bond) are:
1.
2.
3.
4.
The balanced chemical equation for the combustion reaction of Butane is :
1. | \(\mathrm{2 {C}_4 {H}_{10({g})}+13 {O}_{2({g})} \rightarrow 8 {CO}_{2({g})}+10 {H}_2 {O}}+\) Heat Butane |
2. | \(\mathrm{2 {C}_4 {H}_{10({g})}+13 {O}_{2({g})} \rightarrow 9 {CO}_{2({g})}+10 {H}_2 {O}+}\) Heat Butane |
3. | \(\mathrm{2 {C}_4 {H}_{10({g})}+14 {O}_{2({g})} \rightarrow 8 {CO}_{({g})}+10 {H}_2 {O}}+\) Heat Butane |
4. | \( \mathrm{{C}_4 {H}_{10({g})}+13 {O}_{2({g})} \rightarrow 8 {CO}_{({g})}+10 {H}_2 {O}}+\) Heat Butane |
Out of benzene, m-dinitrobenzene, and toluene, the one that will undergo nitration most easily is :
1. | Benzene | 2. | m–Dinitrobenzene |
3. | Toluene | 4. | None of the above |
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. |
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:
1. | Prop-2-yne | 2. | But-2-ene |
3. | But-2-yne | 4. | Prop-2-ene |
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
The products of ozonolysis of 1,2-dimethyl benzene (o-xylene) are:
1. Methylglyoxal, 1, 2-dimethylglyoxal, and glyoxal
2. Methylglyoxal, 1, 3-dimethylglyoxal, and glyoxal
3. Methylglyoxal, 1, 4-dimethylglyoxal, and glyoxal
4. Methylglyoxal, 1, 5-dimethylglyoxal, and glyoxal
The correct order of decreasing reactivity of the following compounds:
Chlorobenzene, 2,4-Dinitrochlorobenzene, and p-Nitrochlorobenzene
with an electrophile (E+) is :
1. | Chlorobenzene > p–Nitrochlorobenzene > 2,4-Dinitrochlorobenzene |
2. | p – Nitro chlorobenzene > 2, 4-Dinitrochlorobenzene > Chlorobenzene |
3. | Chlorobenzene > 2, 4-Dinitrochlorobenzene > p-Nitrochlorobenzene |
4. | 2, 4-Dinitrochlorobenzene > Chlorobenzene > p-Nitrochlorobenzene |