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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
1. Sublimation
2. Distillation
3. Chromatography
4. Crystallization
Subtopic: Qualitative Analysis of Organic Compounds |
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Match List I with List II.
Choose the correct answer from the options given below:
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
| List I (Molecule) |
List II (Number and types of bond/s between two carbon atoms) |
||
| A. | Ethane | I. | One σ−bond and Two π−bonds |
| B. | Ethene | II. | Two π-bonds |
| C. | Carbon molecule, C2 |
III. | One σ-bond |
| D. | Ethyne | IV. | One σ−bond and One π−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 |
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Determine the IUPAC name of the compound with the molecular formula C₆H₁₄ that contains two tertiary carbon atoms.
1. 2-Methyl pentane2. 2, 3-Dimethylbutane
3. 2, 2-Dimethylbutane
4. n-Hexane
Subtopic: Nomenclature |
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Subtopic: Reaction Intermediates ; Preparation & Properties |
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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 |
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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 |
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Subtopic: Qualitative Analysis of Organic Compounds |
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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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A steam volatile organic compound which is immiscible with water has a boiling point of 250∘C. During steam distillation, a mixture of this organic compound and water will boil:
1. Above 100∘C but below 250∘C.
2. Above 250∘C.
3. At 250∘C.
4. Close to but below 100∘C.
1. Above 100∘C but below 250∘C.
2. Above 250∘C.
3. At 250∘C.
4. Close to but below 100∘C.
Subtopic: Qualitative Analysis of Organic Compounds |
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On complete combustion, 0.3 g of an organic compound gave 0.2 g of CO2 and 0.1 g of H2O. The percentage composition of carbon and hydrogen in the compound, respectively is:
1. 4.07% and 15.02%
2. 18.18% and 3.70%
3. 15.02% and 4.07%
4. 3.70% and 18.18%
1. 4.07% and 15.02%
2. 18.18% and 3.70%
3. 15.02% and 4.07%
4. 3.70% and 18.18%
Subtopic: Quantitative Analysis of Organic Compounds |
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