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Q. No.Which of the following will give a positive Lassaigne’s test?
1. NH4OH
2. NH4Cl
3. N2H4
4. CH3 – NH2
Subtopic: Qualitative Analysis of Organic Compounds |
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The correct stability order of the resonating structure of the given compound is:
| A. |  |
| B. |  |
| C. |  |
| 1. | A > B > C | 2. | B > A > C |
| 3. | C > A > B | 4. | B > C > A |
Subtopic: Electron Displacement Effects |
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The correct match among the following is:
| 1. | Hexane-2−one and Hexane−3−one | Position isomers. |
| 2. | Pentane − 3− one and Pentane−2−one | Functional isomers. |
| 3. | 2−Pentene and 1−Pentene | Metamers. |
| 4. | Pentanoic acid and Hexanoic acid | Functional isomers. |
Subtopic: Structural Isomers |
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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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The correct order of nucleophilicity among the following is:
1. \(NH_{2}^{-}>NH_3 \)
2. \(H_2O>OH^-\)
3. \(F^->I^- \)
4. \(Ph-O^->OH^- \)
1. \(NH_{2}^{-}>NH_3 \)
2. \(H_2O>OH^-\)
3. \(F^->I^- \)
4. \(Ph-O^->OH^- \)
Subtopic: Nucleophile & Electrophile |
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Given below are two statements:
Options:
| Statement I: | In the Lassaigne test, an organic compound with both N and S, responds to the test of SCN-. |
| Statement II: | In the Lassaigne test, if Na is taken in excess, it destroys SCN- and forms Na2S and NaCN. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Qualitative Analysis of Organic Compounds |
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0.3 gram of an organic compound on combustion gives 0.2 gram of CO2 and 0.1 gram of H2O. The % of carbon in the compound is:
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 |
87%
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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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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 |
78%
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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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