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Q. No.
Subtopic: Reaction Intermediates ; Preparation & Properties |
78%
From NCERT
NEET - 2022
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How many hydrogens are involved in hyperconjugation in the given organic compound A?
| 1. | 12 | 2. | 13 |
| 3. | 15 | 4. | 16 |
Subtopic: Electron Displacement Effects |
57%
From NCERT
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Ammonium molybdate is the reagent used to detect:
1. Nitrogen as nitrate
2. Phosphorous as phosphate
3. Sulphur as sulphate
4. Iodine as iodate
1. Nitrogen as nitrate
2. Phosphorous as phosphate
3. Sulphur as sulphate
4. Iodine as iodate
Subtopic: Qualitative Analysis of Organic Compounds |
78%
From NCERT
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The technique in which the liquid boils, when the sum of vapour pressure due to organic liquid \((P_1)\) and that due to water \((P_2)\) becomes equal to the atmospheric pressure (P), is:
1. Sublimation
2. Fractional distillation
3. Steam distillation
4. Evaporation
1. Sublimation
2. Fractional distillation
3. Steam distillation
4. Evaporation
Subtopic: Purification of Organic Compounds |
75%
From NCERT
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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 |
78%
From NCERT
NEET - 2022
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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 |
63%
From NCERT
NEET - 2022
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Given:
I and II are classified as:
1. Identical
2. A pair of conformers
3. A pair of geometrical isomers
4. A pair of optical isomers
 |
 |
| I | II |
1. Identical
2. A pair of conformers
3. A pair of geometrical isomers
4. A pair of optical isomers
Subtopic: Conformational Isomers |
64%
From NCERT
NEET - 2013
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Arrange the following in increasing order of stability:
| (a) | \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C}}-\mathrm{CH}_2-\mathrm{CH}_3 \) |
| (b) | \(\left(\mathrm{CH}_3\right)_3 \stackrel{\oplus}{\mathrm{C}} \) |
| (c) | \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C}}\mathrm{H} \) |
| (d) | \( \text {CH}_3 \stackrel{\oplus}{\mathrm{C}}\mathrm{H}_2\) |
| (e) | \( \stackrel{\oplus}{\mathrm{C}}\mathrm{H}_3 \) |
| 1. | e < d < c < a < b | 2. | d < e < c < a < b |
| 3. | a < e < d < c < b | 4. | e < d < c < b < a |
Subtopic: Reaction Intermediates ; Preparation & Properties |
75%
From NCERT
NEET - 2013
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is:
Subtopic: Hybridisation & Structure of Carbon Compounds |
85%
From NCERT
NEET - 2013
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Subtopic: Aromaticity & Polarity |
84%
From NCERT
NEET - 2013
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