Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?

1.
2.
3.
4.

Subtopic:  Aliphatic Hydrocarbon - Methods of Preparation |
 75%
From NCERT
NEET - 2016
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In the given reaction 
 
The product P is:

1. 2.
3. 4.
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
NEET - 2016
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The compound that will react most readily with gaseous bromine has the formula:

1. \(C_3H_6\) 2. \(C_2H_2\)
3. \(C_4H_{10}\) 4. \(C_2H_4\)
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
From NCERT
NEET - 2016
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Hydrocarbon (A) reacts with bromine by substitution reaction to form an alkyl bromide B.
B undergoes the Wurtz reaction to give a gaseous hydrocarbon containing less than four carbon atoms.

The formula of (A) is:

1. CHCH
2. CH2=CH2 
3. CH3-CH3
4. CH4

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 68%
From NCERT
NEET - 2018
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The compound C7H8 undergoes the following reactions

C7H83Cl2/hvABr2/FeBZn/HCl C

The product 'C' is-

1. m–Bromotoluene

2. o–Bromotoluene

3. 3–Bromo–2,4,6–trichlorotoluene

4. p–Bromotoluene

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
From NCERT
NEET - 2018
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P, Q, and R in the above-mentioned sequence of reactions are respectively:

1.
2.
3.
4.
Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
 56%
From NCERT
NEET - 2018
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The molecule among the following that has the hybridization sp2sp2sp, and sp from left to right atoms is:

1. HCC-CH

2. CH2=CH-CCH

3. CH2=CH-CH=CH2 

4. CH2-CH=CH-CH3

Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
 90%
From NCERT
NEET - 2018
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The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is:

1.  The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain.
2. The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has a torsional strain.
3. The staggered conformation of ethane is more stable than eclipsed conformation because staggered conformation has no torsional strain.
4. The staggered conformation of ethane is less stable than eclipsed conformation because staggered conformation has a torsional strain.

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 83%
From NCERT
NEET - 2016
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X and Y in the above-mentioned reaction are respectively:
1. X = 2–Butyne; Y = 3–Hexyne
2. X = 2-Butyne; Y = 2-Hexyne
3. X = 1-Butyne; Y = 2-Hexyne
4. X = 1-Butyne; Y = 3–Hexyne

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 60%
From NCERT
NEET - 2016
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Predict the correct intermediate and product in the following reaction: 



1. \(A :\) \(H_{3} C - \underset{OH}{\underset{\left|\right.}{C}} = CH_{2}\) \(\) \(;\) \(B :\) \(\) \(H_{3} C - \underset{HSO_{4}}{\underset{\left|\right.}{C}} = CH_{2}\)

2. \(A :\) \(H_{3} C - \underset{O}{\underset{\left|\right. \left|\right.}{C}} - CH_{3}\) \(\) \(;\) \(B :\) \(\) \(H_{3} C - C \equiv CH\)

3. \(A :\) \(H_{3} C - \overset{OH}{\overset{\left|\right.}{C}} = CH_{2}\) \(\) \(;\) \(B :\) \(\) \(H_{3} C - \overset{O}{\overset{\left|\right. \left|\right.}{C}} - CH_{3}\)


4. \(A :\) \(H_{3} C - \underset{HS O_{4}}{\underset{\left|\right.}{C}} = CH_{2}\) \(\) \(;\) \(B :\) \(\) \(H_{3} C - \underset{O}{\underset{\left|\right. \left|\right.}{C}} - CH_{3}\)
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 77%
From NCERT
NEET - 2017
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