Q. No. undergoes Wurtz reaction to give-
1.
Propane + Ethane
2.
Propane
3.
Propane + Ethane + Butane
4.
Propane + Butane
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The compound most likely to decolorise a solution of cold basic is:
1. CH3– CH3
2. CH3CH2CH3
3.
4.
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A compound among the following that does not undergo Friedel-Craft's reaction easily is-
1. Cumene
2. Xylene
3. Nitrobenzene
4. Toluene
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The correct order of acidity among the following is:
| 1. | \(\mathrm{CH \equiv CH > CH_3 - C \equiv CH }\) \(\mathrm{ > CH_2 = CH_2 > CH_3 - CH_3}\) |
| 2. | \(\mathrm{CH \equiv CH > CH_2 = CH_2 }\) \(\mathrm{ > CH_3 - C \equiv CH > CH_3 - CH_3}\) |
| 3. | \(\mathrm{CH_3 - CH_3 > CH_2 = CH_2 }\) \(\mathrm{ > CH_3 - C \equiv CH > CH \equiv CH }\) |
| 4. | \(\mathrm{ CH_2 = CH_2 > CH_3 - CH_3 }\) \(\mathrm{ > CH_3 - C \equiv CH > CH \equiv CH}\) |
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The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is:
| 1. | The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain. |
| 2. | The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has a torsional strain. |
| 3. | The staggered conformation of ethane is more stable than eclipsed conformation because staggered conformation has no torsional strain. |
| 4. | The staggered conformation of ethane is less stable than eclipsed conformation because staggered conformation has a torsional strain. |
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The compounds among the following that can be generated by Friedel craft acylation is/are -
| I. |  |
| II. |  |
| III. |  |
| IV. |  |
| 1. | II, III and IV | 2. | I, III and IV |
| 3. | I and II | 4. | II and III |
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Cyclopentadiene is much more acidic than cyclopentane, beacuse -
1. Cyclopentadiene has conjugated double bonds.
2. Cyclopentadiene has both sp2 and sp3 hybridized carbon atoms.
3. Cyclopentadiene is a strain-free cyclic system.
4. Cyclopentadienyl anion ion, the conjugate base of cyclopentadiene, is an aromatic species and hence has higher stability.
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A compound among the following that gives the maximum % of meta product on nitration
(using HNO3/H2SO4) is :
1. Toluene
2. Aniline
3. Benzene
4. Isopropyl benzene
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