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Q. No.The number of \(\sigma\) bonds, \(\pi\) bonds and lone pair of electrons in pyridine respectively are:
1. 12, 2, 1
2. 11, 2, 0
3. 12, 3, 0
4. 11, 3, 1
Subtopic: Hybridisation & Structure of Carbon Compounds |
66%
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 |
72%
From NCERT
NEET - 2023
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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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Compound, among the following, that cannot be a tautomer of 1,3-cyclohexanedione is:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Structural Isomers |
76%
From NCERT
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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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In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with \(\text{Fe}^{3+}\) due to the formation of:
1. \([\mathrm{Fe}(\mathrm{SCN})]^{2+} \)
2. \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH}_2 \mathrm{O} \)
3. \(\mathrm{NaSCN} \)
4. \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-} \)
1. \([\mathrm{Fe}(\mathrm{SCN})]^{2+} \)
2. \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH}_2 \mathrm{O} \)
3. \(\mathrm{NaSCN} \)
4. \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-} \)
Subtopic: Qualitative Analysis of Organic Compounds |
63%
From NCERT
NEET - 2023
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Subtopic: Reaction Intermediates ; Preparation & Properties |
77%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Select the correct option based on the statements below:
| Assertion (A): | Chlorine is an electron-withdrawing group, yet it exhibits ortho- and para-directing behavior in electrophilic aromatic substitution. |
| Reason (R): | Inductive effect of chlorine destabilises the intermediate carbocation formed during the electrophilic substitution, however due to the more pronounced resonance effect, the halogen stabilises the carbocation at ortho and para positions. |
| 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: Electron Displacement Effects |
77%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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What is the hybridization shown by C1 and C2 carbons, respectively in the given compound?
\(\mathrm{ OHC-CH=CH-{^2}CH_2-{^1}COOCH_3}\)
\(\mathrm{ OHC-CH=CH-{^2}CH_2-{^1}COOCH_3}\)
| 1. | sp2 and sp3 | 2. | sp2 and sp2 |
| 3. | sp3 and sp2 | 4. | sp3 and sp3 |
Subtopic: Hybridisation & Structure of Carbon Compounds |
60%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Match each item in Column I with one in Column II and select the correct match from the codes given
| List-I | List-II | ||
| (a) | Separation of aniline-water mixture | (i) | Fractional distillation |
| (b) | Separation of aniline-chloroform mixture | (ii) | Distillation under reduced pressure |
| (c) | Separation of glycerol from spent-lye | (iii) | Distillation |
| (d) | Separation of different fractions of crude oil | (iv) | Steam distillation |
Codes:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (iv) | (i) | (iii) | (ii) |
| 3. | (iv) | (ii) | (iii) | (i) |
| 4. | (iv) | (iii) | (ii) | (i) |
Subtopic: Purification of Organic Compounds |
72%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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