NEET Chemistry MCQ: NCERT Alkynes Reaction | NEET.Guide Questions

The reaction of 1 equivalent of $HBr$ with 1-phenylpropyne in the presence of peroxides yields predominantly:

A

1-Bromo-1-phenylpropene

B

2-Bromo-1-phenylpropene

C

1-Bromo-1-phenylpropane

D

2-Bromo-1-phenylpropane

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2.5 mins

🔄Ncert Concepts :Alkynes, Addition Reactions, Peroxide Effect, Free Radicals

Related Questions

How many pi bonds are present in an alkyne?

A

1

B

2

C

3

D

4

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Alkynes, Chemical Bonding, Pi Bonds

Hydrocarbon reacts with metal by displacing the H-atom is:

A

${\rm{C}}{{\rm{H}}_4}$

B

${{\rm{C}}_2}{{\rm{H}}_6}$

C

${{\rm{C}}_2}{{\rm{H}}_4}$

D

${{\rm{C}}_2}{{\rm{H}}_2}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Hydrocarbons, Acidity, Metal Reactions, Terminal Alkynes

$Ca{C_2} + {H_2}O o A\xrightarrow[{{H_2}S{O_4}}]{{HgS{O_4}}}B,$ Identify $A$ and $B$

A

${C_2}{H_2}\,\,and\,\,C{H_3}CHO$

B

$C{H_4}\,\,and\,\,HCOOH$

C

${C_2}{H_4}\,\,and\,\,C{H_3}COOH$

D

${C_2}{H_2}\,\,and\,\,C{H_3}COOH$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :3 mins

🔄Ncert Concepts :Reaction of metal carbides with water, Hydration of alkynes, Markovnikov's rule

On passing electric discharge through graphite in presence of ${{\rm{H}}_2}$ the compound formed is:

A

${\rm{C}}{{\rm{H}}_4}$

B

${{\rm{C}}_2}{{\rm{H}}_6}$

C

${{\rm{C}}_2}{{\rm{H}}_2}$

D

All of these

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Reaction of carbon with hydrogen, Allotropes of carbon, Chemical reactions

When 2-butyne is treated with ${\rm{Pd}} - {\rm{BaS}}{{\rm{O}}_4}$ ; the product formed will be

A

cis-2-butene

B

trans-2-butene

C

1-butene

D

2-hydroxy butane

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :alkyne reduction, Lindlar's catalyst, stereochemistry

Which of the following compounds can form metallic derivatives?

A

Ethane

B

Propyne

C

2-butyne

D

2-butene

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Acidity of alkynes, Formation of metal acetylides, Terminal alkynes

Which of the following compounds react with, an aqueous solution of ${\rm{Ag}}{\left( {{\rm{N}}{{\rm{H}}_2}} \right)_2}{\rm{OH}}$ ?

A

ethane

B

Ethene

C

1-butyne

D

2-butyne

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Reactions of alkynes, Tollens' reagent, Acidity of terminal alkynes

Silver acetylide when heated with HCl gives:

A

${{\rm{C}}_2}{{\rm{H}}_2}$

B

${{\rm{H}}_2}$

C

${{\rm{C}}_2}{{\rm{H}}_4}$

D

${{\rm{C}}_6}{{\rm{H}}_6}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Organic Chemistry, Chemical Reactions, Acetylides, Acid-Base Reactions

The hydrocarbon which can react with sodium in liquid ammonia is

A

${\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_2}{\rm{C}} \equiv {\rm{CC}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_3}$

B

${\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}{\rm{C}} \equiv {\rm{CH}}$

C

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

D

${\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}{\rm{C}} \equiv {\rm{CC}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_3}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :alkynes, terminal alkynes, sodium in liquid ammonia

Base strength of $\mathop {C{H_3}\overline C {H_2}}\limits_{\left( I \right)} ,\,\,\,\,\mathop {{H_2}C = \overline C H}\limits_{\left( {II} \right)} \,\,\,\,,\,\,\mathop {HC \equiv \overline C }\limits_{\left( {III} \right)}$ is in the order of

A

$I > III > II$

B

$I > II > III$

C

$II > I > III$

D

$III > II > I$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Analyzing

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Base strength, stability of conjugate acid, hybridization, inductive effect

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