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Q. No.On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as:
1.
Sublimation
2.
Distillation
3.
Chromatography
4.
Crystallization
Subtopic: Qualitative Analysis of Organic Compounds |
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Level 1: 80%+
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Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I (Molecule) |
List-II
(Number and types of bond/s between two carbon atoms)
|
||
| A. | Ethane | I. | \(\small{\mathrm{One ~\sigma-bond~ and~ Two~ \pi-bonds}}\) |
| B. | Ethene | II. | \(\text { Two } \pi \text {-bonds }\) |
| C. | Carbon molecule, \(\mathrm{C} _2\) |
III. | \(\text { One } \sigma \text {-bond }\) |
| D. | Ethyne | IV. | \(\small{\mathrm{One ~\sigma-bond ~and ~One~ \pi-bond}}\) |
| 1. | A-IV, B-III, C-II, D-I | 2. | A-III, B-IV, C-II, D-I |
| 3. | A-III, B-IV, C-I, D-II | 4. | A-I, B-IV, C-II, D-III |
Subtopic: Hybridisation & Structure of Carbon Compounds |
76%
Level 2: 60%+
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Subtopic: Reaction Intermediates ; Preparation & Properties |
73%
Level 2: 60%+
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The method used for quantitative estimation of halogens is:
1. Dumas method
2. Carius method
3. Kjeldahl's method
4. Combustion method
1. Dumas method
2. Carius method
3. Kjeldahl's method
4. Combustion method
Subtopic: Qualitative Analysis of Organic Compounds |
71%
Level 2: 60%+
NEET - 2024
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The technique used to purify liquids having high boiling points and getting decomposed at or below their boiling points is:
1. Fractional distillation
2. Steam distillation
3. Simple distillation
4. Distillation under reduced pressure
1. Fractional distillation
2. Steam distillation
3. Simple distillation
4. Distillation under reduced pressure
Subtopic: Qualitative Analysis of Organic Compounds |
62%
Level 2: 60%+
NEET - 2024
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Subtopic: Qualitative Analysis of Organic Compounds |
74%
Level 2: 60%+
NEET - 2024
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Which of the following options is the correct IUPAC name for the given compound?
1. 4-Ethyl-1-fluoro-2-nitrobenzene
2. 4-Ethyl-1-fluoro-6-nitrobenzene
3. 3-Ethyl-6-fluoro-1-nitrobenzene
4. 1-Ethyl-4-fluoro-3-nitrobenzene
1. 4-Ethyl-1-fluoro-2-nitrobenzene
2. 4-Ethyl-1-fluoro-6-nitrobenzene
3. 3-Ethyl-6-fluoro-1-nitrobenzene
4. 1-Ethyl-4-fluoro-3-nitrobenzene
Subtopic: Nomenclature |
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An organic compound that is immiscible with water and undergoes steam distillation has a normal boiling point of 250 °C. At what temperature does the mixture of this compound and water distill during steam distillation?
1. Above 100 °C but significantly below 250 °C2. Above 250 °C
3. At 250 °C
4. Slightly below 100 °C
Subtopic: Qualitative Analysis of Organic Compounds |
Level 3: 35%-60%
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On complete combustion, \(0.3 \mathrm{~g}\) of an organic compound gave \(0.2 \mathrm{~g}\) of \(\mathrm{CO}_2~ \mathrm{and}~ 0.1 \mathrm{~g}\) of \(\mathrm{H}_2 \mathrm{O}\). The percentage composition of carbon and hydrogen in the compound, respectively is:
1. \(4.07 \% ~\mathrm{and}~ 15.02 \%\)
2. \(18.18 \% ~\mathrm{and}~ 3.70 \%\)
3. \(15.02 \% ~\mathrm{and}~ 4.07 \%\)
4. \(3.70 \% ~\mathrm{and}~ 18.18 \%\)
1. \(4.07 \% ~\mathrm{and}~ 15.02 \%\)
2. \(18.18 \% ~\mathrm{and}~ 3.70 \%\)
3. \(15.02 \% ~\mathrm{and}~ 4.07 \%\)
4. \(3.70 \% ~\mathrm{and}~ 18.18 \%\)
Subtopic: Quantitative Analysis of Organic Compounds |
74%
Level 2: 60%+
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The stabilization of a carbocation by an attached methyl group is primarily due to:
| 1. | -I inductive effect | 2. | Electromeric effect |
| 3. | Hyperconjugation | 4. | Mesomeric effect |
Subtopic: Electron Displacement Effects |
73%
Level 2: 60%+
NEET - 2024
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