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Q. No.\(\mathrm{CH_3-CH_3, \ CH_3-CH_2-CH_3, \ }\)
\(\mathrm{\left(CH_3\right)_2 CH-CH_3, }\) and \(\mathrm{CH_3-CH_2-CH\left(CH_3\right)_2 }\)
The increasing order of stability of the free radicals formed from homolytic fission of the above three alkanes is:
1.
\(\mathrm{ (CH_3)_2 \dot{C}-CH_2 CH_3<CH_3-\dot{C} H-CH_3 \\ <CH_3-\dot{C} H_2<(CH_3)_3 \dot{C} }\)
2.
\( \mathrm{CH_3-\dot{C} H_2<CH_3-\dot{C} H-CH_3 \\ <\left(CH_3\right)_2 \dot{C}-CH_2 CH_3<\left(CH_3\right)_3 \dot{C}}\)
3.
\(\mathrm{CH_3-\dot{C} H_2<CH_3-\dot{C} H-CH_3\\ <\left(CH_3\right)_3 \dot{C}<\left(CH_3\right)_2 \dot{C}-CH_2 CH_3 }\)
4.
\(\mathrm{ \left(CH_3\right)_3 \dot{C}<\left(CH_3\right)_2 \dot{C}-CH_2-CH_3 \\ <CH_3-\dot{C} H-CH_3<CH_3-\dot{C} H_2 }\)
\(\mathrm{\left(CH_3\right)_2 CH-CH_3, }\) and \(\mathrm{CH_3-CH_2-CH\left(CH_3\right)_2 }\)
Subtopic: Reaction Intermediates ; Preparation & Properties |
79%
Level 2: 60%+
NEET - 2013
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The outer orbitals of C in an ethene molecule can be considered to be hybridized to given three equivalent sp2 orbitals. The total number of sigma (\(\sigma\)) and pi(\(\pi\)) bonds in ethene molecule are:
1. 3 sigma (\(\sigma\)) and 2 pi(\(\pi\)) bonds
2. 4 sigma (\(\sigma\)) and 1 pi(\(\pi\)) bonds
3. 5 sigma (\(\sigma\)) and 1 pi(\(\pi\)) bonds
4. 1 sigma (\(\sigma\)) and 2 pi(\(\pi\)) bonds
1. 3 sigma (\(\sigma\)) and 2 pi(\(\pi\)) bonds
2. 4 sigma (\(\sigma\)) and 1 pi(\(\pi\)) bonds
3. 5 sigma (\(\sigma\)) and 1 pi(\(\pi\)) bonds
4. 1 sigma (\(\sigma\)) and 2 pi(\(\pi\)) bonds
Subtopic: Hybridisation & Structure of Carbon Compounds |
85%
Level 1: 80%+
NEET - 2013
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Subtopic: Electron Displacement Effects |
82%
Level 1: 80%+
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Subtopic: Structural Isomers |
80%
Level 1: 80%+
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The curved arrow shows an electron movement:
1. Towards a nucleophile
2. Towards an electrophile
3. Away from an electrophile
4. In either direction
1. Towards a nucleophile
2. Towards an electrophile
3. Away from an electrophile
4. In either direction
Subtopic: Bond Cleavage & Isomerism |
69%
Level 2: 60%+
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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
1. 12, 2, 1
2. 11, 2, 0
3. 12, 3, 0
4. 11, 3, 1
Subtopic: Hybridisation & Structure of Carbon Compounds |
68%
Level 2: 60%+
NEET - 2023
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Nitrogen detection in an organic compound is carried out by Lassaigne's test. The blue colour formed corresponds to which of the following formulae:
1. \(\mathrm{Fe_3[Fe(CN)_6]_2}\)
2. \(\mathrm{Fe_4[Fe(CN)_6]_3}\)
3. \(\mathrm{Fe_4[Fe(CN)_6]_2}\)
4. \(\mathrm{Fe_3[Fe(CN)_6]_3}\)
1. \(\mathrm{Fe_3[Fe(CN)_6]_2}\)
2. \(\mathrm{Fe_4[Fe(CN)_6]_3}\)
3. \(\mathrm{Fe_4[Fe(CN)_6]_2}\)
4. \(\mathrm{Fe_3[Fe(CN)_6]_3}\)
Subtopic: Qualitative Analysis of Organic Compounds |
76%
Level 2: 60%+
NEET - 2013
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Subtopic: Aromaticity & Polarity |
84%
Level 1: 80%+
NEET - 2013
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is:
Subtopic: Hybridisation & Structure of Carbon Compounds |
84%
Level 1: 80%+
NEET - 2013
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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 |
75%
Level 2: 60%+
NEET - 2023
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