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Q. No.The correct order of acidity among the following is:
1.
\(\mathrm{CH \equiv CH > CH_3 - C \equiv CH }\)
\(\mathrm{ > CH_2 = CH_2 > CH_3 - CH_3}\)
2.
\(\mathrm{CH \equiv CH > CH_2 = CH_2 }\)
\(\mathrm{ > CH_3 - C \equiv CH > CH_3 - CH_3}\)
3.
\(\mathrm{CH_3 - CH_3 > CH_2 = CH_2 }\)
\(\mathrm{ > CH_3 - C \equiv CH > CH \equiv CH }\)
4.
\(\mathrm{ CH_2 = CH_2 > CH_3 - CH_3 }\)
\(\mathrm{ > CH_3 - C \equiv CH > CH \equiv CH}\)
\(\mathrm{ > CH_2 = CH_2 > CH_3 - CH_3}\)
\(\mathrm{ > CH_3 - C \equiv CH > CH_3 - CH_3}\)
\(\mathrm{ > CH_3 - C \equiv CH > CH \equiv CH }\)
\(\mathrm{ > CH_3 - C \equiv CH > CH \equiv CH}\)
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
79%
From NCERT
NEET - 2017
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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. \(A :\) \(H_{3} C - \underset{HS O_{4}}{\underset{\left|\right.}{C}} = CH_{2}\) \(\) \(;\) \(B :\) \(\) \(H_{3} C - \underset{O}{\underset{\left|\right. \left|\right.}{C}} - CH_{3}\)
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 |
78%
From NCERT
NEET - 2017
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The compound that will react most readily with gaseous bromine has the formula:
| 1. | \(\mathrm{C_3H_6}\) | 2. | \(\mathrm{C_2H_2}\) |
| 3. | \(\mathrm{C_4H_{10}}\) | 4. | \(\mathrm{C_2H_4}\) |
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.
2.
3.
4.
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
70%
From NCERT
NEET - 2018
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The compound undergoes the following reactions
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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Subtopic: Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
57%
From NCERT
NEET - 2018
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The molecule among the following that has the hybridization from left to right atoms is:
1.
2.
3.
4.
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 |
84%
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 |
61%
From NCERT
NEET - 2016
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HCl with an alkene X reacts in accordance with Markovnikov’s rule to give 1-Chloro-1-methylcyclohexane. The structure of alkene (X) is:
| 1. |  |
2. |  |
| 3. | (1) and (2) | 4. |  |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
77%
From NCERT
NEET - 2015
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