Which one of the following reactions does not belong to "Lassaigne's test"?
| 1. | \(\mathrm{Na}+\mathrm{X} \underset{\Delta}{\longrightarrow}+\mathrm{NaX} \) |
| 2. | \(2 \mathrm{CuO}+\mathrm{C} \xrightarrow[\Delta]{} 2 \mathrm{Cu}+\mathrm{CO}_2 \) |
| 3. | \(\mathrm{Na}+\mathrm{C}+\mathrm{N} \xrightarrow[\Delta]{} \mathrm{NaCN} \) |
| 4. | \(2 \mathrm{Na}+\mathrm{S} \xrightarrow[\Delta]{} \mathrm{Na}_2 \mathrm{~S}\) |
Subtopic: Qualitative Analysis of Organic Compounds |
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Which one of the following compounds can exist as cis-trans isomers?
1. 1, 1-Dimethycyclopropane
2. 1, 2-Dimethylcyclohexane
3. Pent-1-ene
4. 2-Methylhex-2-ene
1. 1, 1-Dimethycyclopropane
2. 1, 2-Dimethylcyclohexane
3. Pent-1-ene
4. 2-Methylhex-2-ene
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
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Among the given compounds I-III, the correct order of bond dissociation energy of \(C-H\) bond marked with * is:
1. III > II > I
2. II > III > I
3. II > I > III
4. I > II > III
 |
 |
 |
| I | II | III |
2. II > III > I
3. II > I > III
4. I > II > III
Subtopic: Aliphatic Hydrocarbon- Physical Properties | Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
Level 3: 35%-60%
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
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Subtopic: Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
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Match List-I with List-II :
Choose the correct answer from the options given below:
1. A-III, B-I, C-IV, D-II
2. A-III, B-II, C-I, D-IV
3. A-II, B-IV, C-I, D-III
4. A-II, B-I, C-IV, D-III
| List-I (Example) |
List-II (Type of solution) |
||
| A. | Humidity | I. | Solid in solid |
| B. | Alloys | II. | Liquid in gas |
| C. | Amalgams | III. | Solid in gas |
| D. | Smoke | IV. | Liquid in solid |
1. A-III, B-I, C-IV, D-II
2. A-III, B-II, C-I, D-IV
3. A-II, B-IV, C-I, D-III
4. A-II, B-I, C-IV, D-III
Subtopic: Introduction & Colligative properties |
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Which of the following is true, when \(5\) moles of liquid \(\text X\) and \(10\) moles of liquid \(\text Y\) make a solution having a vapour pressure of \(70\) torr?
[Given: The vapour pressures of pure \(\text X\) and \(\text Y\) are \(63\) torr and \(78\) torr respectively]
[Given: The vapour pressures of pure \(\text X\) and \(\text Y\) are \(63\) torr and \(78\) torr respectively]
| 1. | The solution is ideal. |
| 2. | The solution has a volume that is greater than the sum of individual volumes. |
| 3. | The solution shows positive deviation. |
| 4. | The solution shows negative deviation. |
Subtopic: Raoult's Law |
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Which of the following aqueous solution will exhibit highest boiling point?
1. \(0.01 \mathrm{M} ~\mathrm{Na}_2 \mathrm{SO}_4 \)
2. \(0.015 \text M~\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6 \)
3. \(0.01 \text {M Urea} \)
4. \(0.01 \mathrm{M} ~\mathrm{KNO}_3\)
1. \(0.01 \mathrm{M} ~\mathrm{Na}_2 \mathrm{SO}_4 \)
2. \(0.015 \text M~\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6 \)
3. \(0.01 \text {M Urea} \)
4. \(0.01 \mathrm{M} ~\mathrm{KNO}_3\)
Subtopic: Elevation of Boiling Point | Van’t Hoff Factor |
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If the molar conductivity \(\left(\Lambda_{\mathrm{m}}\right)\) of a \(0.050 ~\text{mol}~ \text{L}^{-1}\) solution of a monobasic weak acid is \(90 ~\text{S} ~\text{cm}^2 ~\text{mol}^{-1}\), then its degree of dissociation will be: [Assume \(\Lambda_{+}^0=349.6~ \mathrm{S ~cm}^2 \mathrm{~mol}^{-1}\) and \(\mathrm{\Lambda}_{-}^{\circ}=50.4 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1} \)]
| 1. | \( 0.225 \) | 2. | \( 0.215 \) |
| 3. | \(0.115 \) | 4. | \(0.125\) |
Subtopic: Conductance & Conductivity |
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