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Q. No.How many geometrical isomers are possible for a compound with the molecular formula \(\mathrm{C_2BrClFI}\)?
1. 3
2. 4
3. 5
4. 6
Subtopic: Stereo Isomers |
Level 3: 35%-60%
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The Incorrect statement concerning the structures E, F, and G is :
1. E,F, and G are resonance structures
2. E,F and G are tautomers
3. F and G are geometrical isomers
4. F and G are diastereomers
1. E,F, and G are resonance structures
2. E,F and G are tautomers
3. F and G are geometrical isomers
4. F and G are diastereomers
Subtopic: Conformational Isomers |
Level 3: 35%-60%
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Which one of the following is a correct statement when two compounds I and II
are eluted by column chromatography (adsorption of I > II)?
1. II moves slower and has higher \(R_f\) value than I
2. II moves faster and has higher \(R_f\) value than I
3. I moves faster and has higher \(R_f\) value than II
4. I moves slower and has higher \(R_f\) Value than II
are eluted by column chromatography (adsorption of I > II)?
1. II moves slower and has higher \(R_f\) value than I
2. II moves faster and has higher \(R_f\) value than I
3. I moves faster and has higher \(R_f\) value than II
4. I moves slower and has higher \(R_f\) Value than II
Subtopic: Purification of Organic Compounds |
58%
Level 3: 35%-60%
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The following compound is named as :
1. 6-Mercaptocyclohex-4-ene-1,3-diol
2. 1-Mercaptocyclohex-2-ene-4,6-diol
3. 1-Mercaptocyclohex-5-ene-2,4-diol
4. 4-Mercaptocyclohex-2-ene-1,5-diol
1. 6-Mercaptocyclohex-4-ene-1,3-diol
2. 1-Mercaptocyclohex-2-ene-4,6-diol
3. 1-Mercaptocyclohex-5-ene-2,4-diol
4. 4-Mercaptocyclohex-2-ene-1,5-diol
Subtopic: Nomenclature |
Level 4: Below 35%
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What is correct about the following structure?
1. Total stereoisomers =4
2. Number of chiral carbons =1
3. Number of optical isomers =2
4. Number of meso compounds= 2
1. Total stereoisomers =4
2. Number of chiral carbons =1
3. Number of optical isomers =2
4. Number of meso compounds= 2
Subtopic: Stereo Isomers |
Level 3: 35%-60%
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In which of the following, hyperconjugation effect is not observed?
1. (i) and (ii)
2. (i), (ii) and (iii)
3. (i) only
4. (i), (ii) and (iv)
1. (i) and (ii)
2. (i), (ii) and (iii)
3. (i) only
4. (i), (ii) and (iv)
Subtopic: Electron Displacement Effects |
Level 3: 35%-60%
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A mixture of A, B, and C is added to a column containing adsorbent for separation. Using solvent, A is eluted first and B is eluted last. The B has:
1. High \(R_f \), less adsorption
2. Low \(R_f \) , strongly adsorbed
3. High \(R_f \), strong adsorption
4. Low \(R_f \) , weakly adsorbed
1. High \(R_f \), less adsorption
2. Low \(R_f \) , strongly adsorbed
3. High \(R_f \), strong adsorption
4. Low \(R_f \) , weakly adsorbed
Subtopic: Purification of Organic Compounds |
Level 3: 35%-60%
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Arrange the C–H bonds marked as x, y, and z in the given compound in decreasing order of their bond dissociation energy (BDE) for homolytic cleavage:
| 1. | y > x > z | 2. | z > x > y |
| 3. | z > y > z | 4. | y > z > x |
Subtopic: Reaction Intermediates ; Preparation & Properties |
51%
Level 3: 35%-60%
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Which of the following is the strongest nucleophile?
| 1. | \( \text{HC} \equiv \text{C}^- \) | 2. | \(\text{H}_2\text{C} = \text{CH}^- \) |
| 3. | \(\text{CH}_3- \text{CH}_2^- \) | 4. | \(\text{NH}_2^-\) |
Subtopic: Nucleophile & Electrophile |
Level 4: Below 35%
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Consider the following statements
The correct statements are:
| a. | In crystallization, an impure compound is dissolved in a solvent in which it is highly soluble at room temperature. |
| b. | In the positive resonance effect(+R), the transfer of electrons is always from an atom or substituted group attached to the conjugated system. |
| c. | One of the technological applications of fractional distillation is to separate different fractions of crude oil in the petroleum industry. |
| 1. | (a) and (b) only | 2. | (b) and (c) only |
| 3. | (a) and (c) only | 4. | (a), (b), and (c) |
Subtopic: Electron Displacement Effects |
51%
Level 3: 35%-60%
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