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Q. No.During Lassaigne's test, the elements present in an organic compound are converted from:
| 1. | Covalent form to covalent form |
| 2. | Ionic form to ionic form |
| 3. | Covalent form to ionic form |
| 4. | Ionic form to covalent form |
Subtopic: Qualitative Analysis of Organic Compounds |
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Subtopic: Structural Isomers | Conformational Isomers |
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The correct IUPAC name of the following compound is:
1. 2,4-diethylhexane
2. 3,5-diethylhexane
3. 3-ethyl-5-methylheptane
4. 3-methyl-5-ethylheptane
1. 2,4-diethylhexane
2. 3,5-diethylhexane
3. 3-ethyl-5-methylheptane
4. 3-methyl-5-ethylheptane
Subtopic: Nomenclature |
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below.
| Statement I: | trans-But-2-ene upon treatment with Br2 in CCl4 gives the following product. |
| Statement II: | cis-But-2-ene upon treatment with alkaline KMnO4 gives the following product. |
In the light of the above statements, choose the most appropriate answer from the options given below.
| 1. | Statement I is incorrect but Statement II is correct |
| 2. | Both Statement I and Statement II are correct |
| 3. | Both Statement I and Statement II are incorrect |
| 4. | Statement I is correct but Statement II is incorrect |
Subtopic: Nomenclature | Structural Isomers | Conformational Isomers |
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The following carbocation is stabilized by the interactions of the empty p orbital with :
| 1. | empty \(\sigma^*\) and empty \(\pi^*\) orbitals |
| 2. | filled \(\sigma\) and filled \(\pi\) orbitals |
| 3. | empty \(\sigma\) and empty \(\pi^*\) orbitals |
| 4. | empty \(\sigma^*\) and filled \(\pi\) orbitals |
Subtopic: Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |
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Arrange the following compounds in the increasing order of polarity :
Choose the correct answer from the options given below.
| A. | \(CH_3CH_2OCH_2CH_3\) |
| B. | \(CH_3CH_2OH\) |
| C. | \(CH_3COCH_3\) |
| D. | \(CH_3COOH\) |
| 1. | A < C < B < D |
| 2. | A < B < C < D |
| 3. | C < A < D < B |
| 4. | C < A < B < D |
Subtopic: Aromaticity & Polarity |
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Among the following, the compound having conjugated double bonds is :
| 1. | hepta-1,6-diene |
| 2. | hepta-1,3-diene |
| 3. | hepta-1,4-diene |
| 4. | hepta-1,5-diene |
Subtopic: Aromaticity & Polarity |
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Consider the following reaction sequences and choose the correct option:
| 1. | M and N are stereoisomers |
| 2. | K and L are geometrical isomers |
| 3. | K and L are enantiomers |
| 4. | M and N are geometrical isomers |
Subtopic: Structural Isomers | Stereo Isomers |
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Which one of the following reactions does not belong to "Lassaigne's test"?
| 1. | \(\mathrm{Na}+\mathrm{X} \underset{\Delta}{\longrightarrow}+\mathrm{NaX} \) |
| 2. | \(2 \mathrm{CuO}+\mathrm{C} \xrightarrow[\Delta]{} 2 \mathrm{Cu}+\mathrm{CO}_2 \) |
| 3. | \(\mathrm{Na}+\mathrm{C}+\mathrm{N} \xrightarrow[\Delta]{} \mathrm{NaCN} \) |
| 4. | \(2 \mathrm{Na}+\mathrm{S} \xrightarrow[\Delta]{} \mathrm{Na}_2 \mathrm{~S}\) |
Subtopic: Qualitative Analysis of Organic Compounds |
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Match List-I with List-II:
Choose the correct answer from the option given below:
1. A-III, B-IV, C-I, D-II
2. A-III, B-IV, C-II, D-I
3. A-IV, B-III, C-I, D-II
4. A-IV, B-III, C-II, D-I
| List-I (Mixture) |
List-II (Method of Separation) |
||
| A. | \( \mathrm{CHCl}_3+ \mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2 \) | I. | Distillation under reduced pressure |
| B. | Crude oil in petroleum industry | II. | Steam distillation |
| C. | Glycerol from spent-lye | III. | Fractional distillation |
| D. | Aniline-water | Iv. | Simple distillation |
1. A-III, B-IV, C-I, D-II
2. A-III, B-IV, C-II, D-I
3. A-IV, B-III, C-I, D-II
4. A-IV, B-III, C-II, D-I
Subtopic: Purification of Organic Compounds |
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