- 1(current)
Q. No.Match List I with List II and mark the appropriate answer:
Codes
| List-I (Quantitative Methods) |
List-II (Principle and reagents used) |
||
| A. | Thin Layer Chromatography | (i). | Partition Chromatography |
| B. | Yellow coloured | (ii). | Adsorption chromatography |
| C. | Paper chromatography | (iii). | Ammonia |
| D. | Kjeldahl method | (iv). | (NH4)3PO4.12MoO3 |
Codes
| A | B | C | D | |
| 1. | (iii) | (iv) | (ii) | (i) |
| 2. | (ii) | (iv) | (i) | (iii) |
| 3. | (ii) | (i) | (iv) | (iii) |
| 4. | (iii) | (iv) | (i) | (ii) |
Subtopic: Qualitative Analysis of Organic Compounds | Quantitative Analysis of Organic Compounds |
90%
Level 1: 80%+
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| Assertion (A): | Kjeldahl method is not used for pyridine. |
| Reason (R): | Nitrogen of pyridine does not change to ammonium sulphate under these conditions. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Quantitative Analysis of Organic Compounds |
91%
Level 1: 80%+
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Which of the following is/are used as adsorbent in adsorption chromatography?
| 1. | Silica gel | 2. | Alumina |
| 3. | Benzene | 4. | Both (1) and (2) |
Subtopic: Conformational Isomers | Quantitative Analysis of Organic Compounds |
89%
Level 1: 80%+
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A mixture contains three volatile liquids: A, B, and C. It is observed that there is a large difference between the boiling point of liquid A and the boiling points of liquids B and C. However, the boiling points of liquids B and C are very close to each other. Which of the following sequence of techniques is most appropriate to completely separate all three liquids from the mixture?
| 1. | A is separated by simple distillation, then B & C by column chromatography |
| 2. | A is separated by simple distillation, then B & C by fractional distillation |
| 3. | A is separated by fractional distillation, then B & C by column chromatography |
| 4. | A is separated by fractional distillation, then B & C by simple distillation |
Subtopic: Quantitative Analysis of Organic Compounds |
79%
Level 2: 60%+
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On complete combustion, 0.3 g of an organic compound yields 0.2 g of CO₂ and 0.1 g of H₂O. Determine the percentage of carbon in the compound:
1. 18.2%
2. 20.2%
3. 16.2%
4. 22.2%
1. 18.2%
2. 20.2%
3. 16.2%
4. 22.2%
Subtopic: Quantitative Analysis of Organic Compounds |
81%
Level 1: 80%+
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In an estimation of bromine by the Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is:
[Atomic mass, Ag=108, Br = 80 g ]
1. 50 %
2. 55.5%
3. 60 %
4. 70 %
Subtopic: Quantitative Analysis of Organic Compounds |
83%
Level 1: 80%+
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- 1(current)
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