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
A compound possessing optical isomerism provided it has the molecular formula C7H16, would be:
1. | 2,3-Dimethyl pentane | 2. | 2,2-Dimethyl butane |
3. | 2-Methyl hexane | 4. | None of the above |
Arrange the following carbanions in order of their decreasing stability:
A. \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}^{-}\)
B. \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}^{-}\)
C. \(\mathrm{H}_3 \mathrm{C}-\mathrm{{C}H_2^-}\)
1. | A > B > C | 2. | B > A > C |
3. | C > B > A | 4. | C > A > B |
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 |
The reagent used in the above conversion is:
1. Cr2O3
2. Alc. KOH
3. Red hot Fe
4. NaNH2/liq.NH3
Decreasing order of acidic behavior of benzene, n-hexane, and ethyne is:
1. Hexane > Ethyne > Benzene
2. Benzene > Hexane > Ethyne
3. Ethyne > Benzene > Hexane
4. Benzene > Ethyne > Hexene
The products formed after ozonolysis of Pent-2-ene are:
1. Ethanal and Methanal
2. Ethanal and Propanal
3. Ethanal and Butanal
4. Ethanal and Ethanal
The mechanism & intermediate involved in the above reaction are:
1. Aromatic electrophilic substitution & carbocation
2. Aromatic Nucleophilic substitution & carbanion
3. Aromatic free radical substitution & Free radical
4. Carbene based substitution reaction & Carbene
The product(s) obtained via oxymercuration (HgSO4 + H2SO4 ) of but-1-yne is -
1.
2. CH3CH2 CH2-CHO
3. CH3CH2CHO + HCHO
4. CH3 CH2COOH + HCOOH
Which of the following Hydrocarbon has the highest octane number?
1. Methane
2. Ethane
3. Iso-octane
4. Triptane