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. | \(2 \mathrm{C}_4 \mathrm{H}_{10(\mathrm{~g})}+13 \mathrm{O}_{2(\mathrm{~g})} \rightarrow 8 \mathrm{CO}_{2(\mathrm{~g})}+10 \mathrm{H}_2 \mathrm{O}+\text { Heat }\) Butane |
2. | \(2 \mathrm{C}_4 \mathrm{H}_{10(\mathrm{~g})}+13 \mathrm{O}_{2(\mathrm{~g})} \rightarrow 9 \mathrm{CO}_{2(\mathrm{~g})}+10 \mathrm{H}_2 \mathrm{O}+\text { Heat }\) Butane |
3. | \(2 \mathrm{C}_4 \mathrm{H}_{10(\mathrm{g})}+14 \mathrm{O}_{2(\mathrm{g})} \rightarrow 8 \mathrm{CO}_{(\mathrm{g})}+10 \mathrm{H}_2 \mathrm{O}+\text { Heat }\) Butane |
4. | \( \mathrm{C}_4 \mathrm{H}_{10(\mathrm{~g})}+13 \mathrm{O}_{2(\mathrm{g})} \rightarrow 8 \mathrm{CO}_{(\mathrm{g})}+10 \mathrm{H}_2 \mathrm{O}+\text { Heat }\) Butane |
Lewis acid(s) that can be used during the ethylation of benzene is/are:
1.
2.
3.
4. All of the above
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 |