NEET Chemistry MCQ: NCERT Alkenes Reactivity | NEET.Guide Questions

Which of the following alkenes exhibits the highest rate of reaction with HCl in an electrophilic addition reaction under standard conditions?

A

Ethene

B

Propene

C

2-Methylpropene

D

2,3-Dimethyl-2-butene

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1.5 mins

🔄Ncert Concepts :Alkenes, Electrophilic Addition, Carbocation Stability, Reaction Rates

Related Questions

The reagent(s) for the following conversion,

cis/are

A

Alcoholic KOH

B

Alcoholic KOH followed by ${\rm{NaN}}{{\rm{H}}_2}$

C

Aqueous KOH followed by ${\rm{NaN}}{{\rm{H}}_2}$

D

$Zn/{\rm{C}}{{\rm{H}}_3}{\rm{OH}}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :3 mins

🔄Ncert Concepts :Elimination reactions, Alkynes synthesis, Strong bases, Dehydrohalogenation

Propylene on hydrolysis with sulphuric acid forms

A

n-propyl alcohol

B

Isopropyl alcohol

C

Ethyl alcohol

D

Butyl alcohol

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :alkene hydration, Markovnikov's rule, reaction mechanism

A mixture of 1-chlorobutane and 2-chlorobutane when treated with alcoholic ${\rm{KOH}}$ gives

A

1-butene

B

2-butene

C

iso-butylene

D

Mixture of 1-butene+2-butene

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Elimination reaction, Saytzeff's rule, Alkyl halides

Sodium ethoxide is specific reagent for:

A

Dehydration

B

Dehydrohalogenation

C

Dehydrogenation

D

Dehalogenation

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Reaction mechanism, reagents, organic chemistry

The presence of ${\rm{A}}{{\rm{g}}^ + }$ ion increases the solubility of alkenes due to the formation of

A

$d\pi - d\sigma$ bonding

B

$p\sigma - p\pi$ bonding

C

$p\pi - d\pi$ bonding

D

$p\pi - d\sigma$ bonding

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :chemical bonding, pi bonding, d-orbitals, solubility, transition metal complexes

The reaction conditions used for converting 1,2-dibromopropane to propylene are

A

${\rm{KOH}},\;alcohol/\Delta$

B

${\rm{KOH}},Water/\Delta$

C

${\rm{Zn}},alcohol/\Delta$

D

${\rm{Na}},alcohol/\Delta$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :dehalogenation, elimination reactions, reducing agents

Alkyl halides get converted to alkenes through:

A

Electrophilic substitution

B

Nucleophilic addition

C

Elimination reaction

D

Hydrolysis

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Alkyl halides, Alkenes, Elimination reaction, Reaction mechanisms

Among the following, which compound cannot be used to synthesize propene via a reaction with HBr and subsequent elimination or through direct elimination?

A

1-propanol

B

2-propanol

C

1-bromopropane

D

propane

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

PYQ YEAR: 2016

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Elimination reaction, HBr addition, Alcohol dehydration, Alkane reactivity

The treatment of $\begin{array}{l}

{\rm{C}}{{\rm{H}}_3}{\rm{C}} = {\rm{CHC}}{{\rm{H}}_3}\

;;;;;;;;;;|\

;;;;;;;{\rm{C}}{{\rm{H}}_3}

\end{array} $with$ {\rm{NaI}}{{\rm{O}}_4} $or boiling$ {\rm{KMn}}{{\rm{O}}_4}$ produces

A

${\rm{C}}{{\rm{H}}_3}{\rm{COC}}{{\rm{H}}_3} + {\rm{C}}{{\rm{H}}_3}{\rm{COOH}}$

B

${\rm{C}}{{\rm{H}}_3}{\rm{COC}}{{\rm{H}}_3} + {\rm{C}}{{\rm{H}}_3}{\rm{CHO}}$

C

${\rm{C}}{{\rm{H}}_3}{\rm{CHO}} + {\rm{C}}{{\rm{O}}_2}$

D

${\rm{C}}{{\rm{H}}_3}{\rm{COC}}{{\rm{H}}_3}\;only$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :3 mins

🔄Ncert Concepts :Oxidative Cleavage, Alkenes, Potassium Permanganate, Sodium Periodate

${{\rm{C}}_6}{{\rm{H}}_{12}}$ on addition of HBr in presence and in absence of peroxide gives some product.

It is :

A

Hexene-3

B

2,3-dimethyl butane-2

C

Symmetrical alkene

D

All of these

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkenes

🎓 Ncert Level:Analyzing

🎯Difficulty :Easy

⚡ Time Required :3 mins

🔄Ncert Concepts :alkene addition, Markovnikov's rule, anti-Markovnikov's rule, peroxide effect, isomerism

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