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Q. No.120 gram of an organic compound on combustion analysis gives 330 gram of carbon dioxide and 270 gram of water. % by mass of C and H in an organic compound is:
1. 50% C and 50% H
2. 60% C and 40% H
3. 80%C and 20% H
4. 75% C and 25% H
1. 50% C and 50% H
2. 60% C and 40% H
3. 80%C and 20% H
4. 75% C and 25% H
Subtopic: Quantitative Analysis of Organic Compounds |
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The order of stability of given carbocations is:
(A) |
 |
| (B) |  |
| (C) |  |
| 1. | A > B > C | 2. | C > B> A |
| 3. | B > A>C | 4. | B > C > A |
Subtopic: Reaction Intermediates ; Preparation & Properties |
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In Duma's method of estimation of nitrogen, 0.2 gram of an organic compound gives 22.4 ml of nitrogen gas at STP. Percentage of nitrogen in the organic compound is:
1. 20 %
2. 12 %
3. 18 %
4. 14 %
1. 20 %
2. 12 %
3. 18 %
4. 14 %
Subtopic: Quantitative Analysis of Organic Compounds |
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The violet coloured complex formed in the Lassaigne's test is:
1. Na4[Fe(CN)5NOS]
2. Na2[Fe(CN)5NO]
3. K4[Fe(CN)6]
4. Fe4[Fe(CN)6]3
1. Na4[Fe(CN)5NOS]
2. Na2[Fe(CN)5NO]
3. K4[Fe(CN)6]
4. Fe4[Fe(CN)6]3
Subtopic: Qualitative Analysis of Organic Compounds |
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0.5 gram of an organic compound gives 0.4 gram of dry AgBr ppt.
The percentage of Br in the given organic compound is:
[At. Wt. of Ag=108, At. Wt. of Br=80]
1. 45 %
2. 34 %
3. 25 %
4. 52 %
The percentage of Br in the given organic compound is:
[At. Wt. of Ag=108, At. Wt. of Br=80]
1. 45 %
2. 34 %
3. 25 %
4. 52 %
Subtopic: Quantitative Analysis of Organic Compounds |
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In thin layer chromatography, which of the following is not used to visualise the separated layer?
| 1. | Visualisation agent in the mobile phase |
| 2. | Spraying of suitable reagent |
| 3. | UV light |
| 4. | Solid I2 |
Subtopic: Purification of Organic Compounds |
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If 0.450 grams of an organic compound containing Carbon, Hydrogen & Oxygen on complete combustion gives 0.735 grams CO2 and 0.45 grams of water, then the mass % of oxygen in the compound is:
(Report your answer to the nearest integer)
(Report your answer to the nearest integer)
| 1. | 31 | 2. | 49 |
| 3. | 44 | 4. | 51 |
Subtopic: Quantitative Analysis of Organic Compounds |
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Identify the number of compounds, among the following, that have the same degree of unsaturation:
(A) \(CH_3-CH=CH-C\equiv N \)
(B) \(CH_3-N=CH-C\equiv CH \)
(C) \(CH\equiv C-NH-CH=CH_2 \)
(D) \(CH_2=CH-CH_2-C\equiv N \)
1. 2
2. 3
3. 0
4. 4
(A) \(CH_3-CH=CH-C\equiv N \)
(B) \(CH_3-N=CH-C\equiv CH \)
(C) \(CH\equiv C-NH-CH=CH_2 \)
(D) \(CH_2=CH-CH_2-C\equiv N \)
1. 2
2. 3
3. 0
4. 4
Subtopic: Hybridisation & Structure of Carbon Compounds |
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Use the provided information in the following paper chromatogram.
Figure: Paper chromatography for compounds A and B.
The Rf value of A is Y×10–1. The value of Y is:
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 8 |
Subtopic: Qualitative Analysis of Organic Compounds |
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Which of the following compounds is added to the sodium extract before the addition of silver nitrate for testing of halogens?
| 1. | Nitric acid | 2. | Ammonia |
| 3. | Hydrochloric acid | 4. | Sodium hydroxide |
Subtopic: Qualitative Analysis of Organic Compounds |
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