The total number of possible isomers (both structural as well as stereoisomers)
of cyclic ethers of molecular formula \(C_4H_8O \) is :
1. 10
2. 11
3. 6
4. 8
of cyclic ethers of molecular formula \(C_4H_8O \) is :
1. 10
2. 11
3. 6
4. 8
Subtopic: Ethers: Preparation & Properties, Uses |
Level 4: Below 35%
NEET - 2025
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Identify the suitable reagent for the following conversion:
| 1. | (i) \(NaBH_4\), (ii) \(H^+/H_2O\) | 2. | \(H_2/ Pd-BaSO_4\) |
| 3. | (i) \(LiAlH_4\), (ii) \(H^+/H_2O\) | 4. | (i)\(AlH(iBu)_2\)(ii) \(H_2O\) |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
Level 3: 35%-60%
NEET - 2025
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Subtopic: Aldehydes & Ketones: Preparation & Properties |
Level 3: 35%-60%
NEET - 2025
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The correct order of decreasing acidity of the following aliphatic acids is:
| 1. | \(\small {\mathrm{HCOOH}>\mathrm{CH}_3 \mathrm{COOH}> \left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH} }\) \(\small {> \left(\mathrm{CH}_3\right)_3 \mathrm{CCOOH}} \) |
| 2. | \(\small {\mathrm{HCOOH}>\left(\mathrm{CH}_3\right)_3 \mathrm{CCOOH}> \left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH}}\) \( \small{ > \mathrm{CH}_3 \mathrm{COOH}} \) |
| 3. | \(\small { \left(\mathrm{CH}_3\right)_3 \mathrm{CCOOH}>\left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH}> \mathrm{CH}_3 \mathrm{COOH}}\) \(\small {>\mathrm{HCOOH}} \) |
| 4. | \(\small {\mathrm{CH}_3 \mathrm{COOH}>\left(\mathrm{CH}_3\right)_2 \mathrm{CHCOOH}> \left(\mathrm{CH}_3\right)_3\mathrm{CCOOH} }\) \(\small {>\mathrm{HCOOH}} \) |
Subtopic: Carboxylic Acids: Preparation & Properties |
64%
Level 2: 60%+
NEET - 2025
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The correct order of decreasing basic strength of the given amines is:
| 1. | N-ethylethanamine > ethanamine > N -methylaniline > benzenamine |
| 2. | benzenamine > ethanamine > N -methylaniline >N-ethylethanamine |
| 3. | N -methylaniline > benzenamine > ethanamine >N-ethylethanamine |
| 4. | N-ethylethanamine > ethanamine > benzenamine >N-methylaniline |
Subtopic: Amines - Preparation & Properties |
60%
Level 2: 60%+
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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%
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If a Sugar ' X ' is found in honey, is a keto sugar, exists in \(\alpha\) and \(\beta\) - anomeric forms and is laevorotatory, then find out 'X':
1. Maltose
2. Sucrose
3. D-Glucose
4. D-Fructose
1. Maltose
2. Sucrose
3. D-Glucose
4. D-Fructose
Subtopic: Carbohydrates - Classification & D-L configuration |
58%
Level 3: 35%-60%
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Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (Name of Vitamin) |
List-II (Deficiency disease) |
||
| A. | Vitamin \(B_{12}\) | I. | Cheilosis |
| B. | Vitamin \(D\) | II. | Convulsions |
| C. | Vitamin \(B_{2}\) | III. | Rickets |
| D. | Vitamin \(B_{6}\) | IV. | Pernicious anaemia |
| 1. | A-II, B-III, C-I, D-IV | 2. | A-IV, B-III, C-II, D-I |
| 3. | A-I, B-III, C-II, D-IV | 4. | A-IV, B-III, C-I, D-II |
Subtopic: Vitamins, Hormones & Enzymes |
60%
Level 2: 60%+
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Given below are two statements :
In light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | Like nitrogen that can form ammonia, arsenic can form arsine. |
| Statement II: | Antimony cannot form antimony pentoxide. |
In light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Statement I is correct but Statement II is incorrect |
| 2. | Statement I is incorrect but Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Group 15 - Preparation, Properties & Uses |
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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