Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
72%
Level 2: 60%+
NEET - 2025
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
58%
Level 3: 35%-60%
NEET - 2025
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Match List-I with List-II:
Choose the correct answer from the option given below:
1. A-III, B-IV, C-I, D-II
2. A-III, B-IV, C-II, D-I
3. A-IV, B-III, C-I, D-II
4. A-IV, B-III, C-II, D-I
| List-I (Mixture) |
List-II (Method of Separation) |
||
| A. | \( \mathrm{CHCl}_3+ \mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2 \) | I. | Distillation under reduced pressure |
| B. | Crude oil in petroleum industry | II. | Steam distillation |
| C. | Glycerol from spent-lye | III. | Fractional distillation |
| D. | Aniline-water | Iv. | Simple distillation |
1. A-III, B-IV, C-I, D-II
2. A-III, B-IV, C-II, D-I
3. A-IV, B-III, C-I, D-II
4. A-IV, B-III, C-II, D-I
Subtopic: Purification of Organic Compounds |
64%
Level 2: 60%+
NEET - 2025
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Which of the following electronic configurations belong to the main group elements?
Choose the correct answer from the option given below:
| A | \([\mathrm{Ne}] 3 \mathrm{~s}^1\) | B | \([\mathrm{Ar}] 3d^3 \mathrm{~4s}^2\) |
| C | \([\mathrm{Kr}] 4 \mathrm{~d}^{10} 5 \mathrm{~s}^2 5 \mathrm{p}^5\) | D | \([\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^1\) |
| E | \(\mathrm{[R n] }5 f^0 6 d^2 7 s^2\) | ||
Choose the correct answer from the option given below:
| 1. | D and E only | 2. | A, C and D only |
| 3. | B and E only | 4. | A and C only |
Subtopic: Modern Periodic Table & Periodicity |
56%
Level 3: 35%-60%
NEET - 2025
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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 |
55%
Level 3: 35%-60%
NEET - 2025
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Phosphoric acid ionizes in three steps, with their ionization constant values \(\mathrm{K}_{\mathrm{a}_1}, \mathrm{~K}_{\mathrm{a}_2} \text { and } \mathrm{K}_{\mathrm{a}_3} \text {, }\)respectively, while \(K\) is the overall ionization constant. Which of the following statements are true for the ionization of phosphoric acid?
Choose the correct answer from the options given below :
1. B, C and D only
2. A, B and C only
3. A and B only
4. A and C only
| A. | \(\log \mathrm{K}=\log \mathrm{K}_{\mathrm{a}_1}+\log \mathrm{K}_{\mathrm{a}_2}+\log \mathrm{K}_{\mathrm{a}_3}\) |
| B. | \(\mathrm{H}_3 \mathrm{PO}_4\) is a stronger acid than \(\mathrm{H}_2 \mathrm{PO}_4^{-}\) and \(\mathrm{HPO}_4^{2-} .\) |
| C. | \(\mathrm{K}_{a_1} >\mathrm{~K}_{\mathrm{a}_2}>\mathrm{K}_{\mathrm{a}_3} \) |
| D. | \(\mathrm{K}_{\mathrm{a}_1}=\frac{\mathrm{K}_{\mathrm{a}_3}+\mathrm{K}_{\mathrm{a}_2}}{2}\) |
1. B, C and D only
2. A, B and C only
3. A and B only
4. A and C only
Subtopic: Ionisation Constant of Acid, Base & Salt |
57%
Level 3: 35%-60%
NEET - 2025
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Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (Ion) |
List-II (Group Number in Cation Analysis) |
||
| A. | \(Co^{2+}\) | I. | Group-I |
| B. | \(Mg^{2+}\) | II. | Group-III |
| C. | \(Pb^{2+}\) | III. | Group-IV |
| D. | \(Al^{3+}\) | IV. | Group-VI |
| 1. | A-III, B-II, C-IV, D-I | 2. | A-III, B-II, C-I, D-IV |
| 3. | A-III, B-IV, C-II, D-I | 4. | A-III, B-IV, C-I, D-II |
Subtopic: Detection of Cations |
Level 3: 35%-60%
NEET - 2025
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Which of the following parameters can determine the higher yield of \(\mathrm{NO}\) in the reaction, \(\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})\) ?
\([ Given: \Delta \mathrm{H}\) of the reaction \(=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1} ]\)
A. higher temperature
B. lower temperature
C. higher concentration of \(\mathrm{N}_2\)
D. higher concentration of \(\mathrm{O}_2\)
Choose the correct answer from the options given below:
1. B, C, D only
2. A, C, D only
3. A, D only
4. B, C only
\([ Given: \Delta \mathrm{H}\) of the reaction \(=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1} ]\)
A. higher temperature
B. lower temperature
C. higher concentration of \(\mathrm{N}_2\)
D. higher concentration of \(\mathrm{O}_2\)
Choose the correct answer from the options given below:
1. B, C, D only
2. A, C, D only
3. A, D only
4. B, C only
Subtopic: Le Chatelier's principle |
69%
Level 2: 60%+
NEET - 2025
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Given below are two statements:
| Statement I: | Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at \(273-278~ \text{K}.\) It decomposes easily in the dry state. |
| Statement II: | Insertion of iodine into the benzene ring is difficult, and hence iodobenzene is prepared through the reaction of benzenediazonium salt with \(KI.\) |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Diazonium Salts: Preparation, Properties & Uses |
66%
Level 2: 60%+
NEET - 2025
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Subtopic: Aldehydes & Ketones: Preparation & Properties |
Level 3: 35%-60%
NEET - 2025
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