What is the correct structure of 2,6-Dimethyl-dec-4-ene?

1. 2.
3. 4.

Subtopic:  Nomenclature |
 82%
From NCERT
NEET - 2021
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The compound which shows metamerism is: 

1. C3H6O 2. C4H10O
3. C5H12 4. C3H8O
Subtopic:  Structural Isomers |
 67%
From NCERT
NEET - 2021
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A liquid compound (x) can be purified by steam distillation only if it is:

1. Steam volatile, immiscible with water 

2. Not steam volatile, miscible with water

3. Steam volatile, miscible with water

4. Not steam volatile, immiscible with water

Subtopic:  Purification of Organic Compounds |
 72%
From NCERT
NEET - 2020
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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 |
 67%
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 |
 75%
From NCERT
NEET - 2022
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Match each item in Column I with one in Column II and select the correct match from the codes given

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

Codes:
(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 |
 75%
From NCERT
NEET - 2022
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What is the hybridization shown by C1 and C2 carbons, respectively in the given compound?
   
\(\mathrm{ OHC-CH=CH-{^2}CH_2-{^1}COOCH_3}\)
 
1. sp2 and sp3 2. sp2 and sp2
3. sp3 and sp2 4. sp3 and sp3
Subtopic:  Hybridisation & Structure of Carbon Compounds |
 64%
From NCERT
NEET - 2022
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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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The most stable carbocation among the following is:
1. 2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 78%
From NCERT
NEET - 2022
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In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with \(\text{Fe}^{3+}\) due to the formation of:

1. \([\mathrm{Fe}(\mathrm{SCN})]^{2+} \)
2. \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH}_2 \mathrm{O} \)
3. \(\mathrm{NaSCN} \)
4. \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-} \)
Subtopic:  Qualitative Analysis of Organic Compounds |
 66%
From NCERT
NEET - 2023
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