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Subtopic: Reaction Intermediates ; Preparation & Properties |
73%
From NCERT
NEET - 2024
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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 |
74%
From NCERT
NEET - 2024
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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 |
63%
From NCERT
NEET - 2024
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Subtopic: Qualitative Analysis of Organic Compounds |
76%
From NCERT
NEET - 2024
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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. | \(\small{\mathrm{One ~\sigma-bond~ and~ Two~ \pi-bonds}}\) |
| B. | Ethene | II. | \(\text { Two } \pi \text {-bonds }\) |
| C. | Carbon molecule, \(\mathrm{C} _2\) |
III. | \(\text { One } \sigma \text {-bond }\) |
| D. | Ethyne | IV. | \(\small{\mathrm{One ~\sigma-bond ~and ~One~ \pi-bond}}\) |
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 |
77%
From NCERT
NEET - 2024
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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 |
Subtopic: Qualitative Analysis of Organic Compounds |
83%
From NCERT
NEET - 2024
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Resonance structures are two or more structures where:
1. Only atoms may move around.
2. Only bonding electrons may move around.
3. Only nonbonding electrons may move around.
4. Only nonbonding electrons, and double and triple bonds may move around.
1. Only atoms may move around.
2. Only bonding electrons may move around.
3. Only nonbonding electrons may move around.
4. Only nonbonding electrons, and double and triple bonds may move around.
Subtopic: Electron Displacement Effects |
71%
From NCERT
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Compound, among the following, that cannot be a tautomer of 1,3-cyclohexanedione is:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Structural Isomers |
75%
From NCERT
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is true but Statement II is false.
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true.
4. Both Statement I and Statement II are false.
| Statement I: | In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates. |
| Statement II: | Hyperconjugation is observed in o-xylene. |
1. Statement I is true but Statement II is false.
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true.
4. Both Statement I and Statement II are false.
Subtopic: Electron Displacement Effects |
From NCERT
NEET - 2023
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Match List -I with List-II
Choose the correct answer from the options given below
| List-I (Mixtures/Sample) |
List-II (Technique used for purification) |
||
| A. | Glycerol from spent lye | (I) | Steam distillation |
| B. | Chloroform + Aniline | (II) | Fractional distillation |
| C. | Fractions of crude oil | (III) | Distillation under reduced pressure |
| D. | Aniline+water | (IV) | Distillation |
Choose the correct answer from the options given below
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | IV | II | I |
| 2. | IV | II | I | III |
| 3. | I | II | III | IV |
| 4. | I | III | II | IV |
Subtopic: Purification of Organic Compounds |
75%
From NCERT
NEET - 2023
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