In Lassaigne's extract of an organic compound both nitrogen and sulphur are present which gives blood red colour with \(Fe^{3+}\) due to the formation of- 
1. \([\mathrm{Fe}(\mathrm{SCN})]^{2+} \)
2. \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \times \mathrm{H}_2 \mathrm{O} \)
3. \(\mathrm{NaSCN} \)
4. \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-} \)
Subtopic:  Qualitative Analysis of Organic Compounds |
 58%
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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
Subtopic:  Hybridisation & Structure of Carbon Compounds |
 61%
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NEET - 2023
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Match List -I with List-II 
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 |
 69%
From NCERT
NEET - 2023
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Given below are two statement:
I: In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates.
II: Hyperconjugation is observed in o-xylene.
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is true but Statement II is false.
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true.
4. Both Statement I and Statement II are false.
Subtopic:  Electron Displacement Effects |
From NCERT
NEET - 2023
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The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?
1. 2.
3. 4.
Subtopic:  Purification of Organic Compounds |
 62%
From NCERT
NEET - 2022
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The correct IUPAC name of the following compound is : 

1. 6-bromo-4-methyl-2-chlorohexan-4-ol
2. 1-bromo-5-chloro-4-methylhexan-3-ol
3. 6-bromo-2-chloro-4-methylhaxan-4-ol
4. 1-bromo-4-methyl-5-chorohexan-3-ol
Subtopic:  Nomenclature |
 73%
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Match list-I with list-II:

List-I List-II
(a) Separation of aniline-water mixture (i) Fractional distillation
(b) Separation of aniline-chloroform mixture (ii) Distillation under reduced pressure
(c) Separation of glycerol from spent-lye (iii) Distillation
(d) Separation of different fractions of crude oil (iv) Steam distillation
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (i) (iii) (ii) (iv)
2. (iv) (i) (iii) (ii)
3. (iv) (ii) (iii) (i)
4. (iv) (iii) (ii) (i)
Subtopic:  Purification of Organic Compounds |
 68%
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What is the hybridization shown by C1 and C2 carbons, respectively in the given compound?

\( OHC-CH=CH-{^2}CH_2-{^1}COOCH_3\)
 
1. sp2 and sp3 2. sp2 and sp2
3. sp3 and sp2 4. sp3 and sp3
Subtopic:  Hybridisation & Structure of Carbon Compounds |
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Which of the following is the most stable carbocation?
1. 2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 74%
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The compound which shows metamerism is: 

1. C3H6O 2. C4H10O
3. C5H12 4. C3H8O
Subtopic:  Structural Isomers |
 65%
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NEET - 2021
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