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

An alkyne 'X' with molecular formula $C_5H_8$ on ozonolysis yields a mixture of propanoic acid and acetic acid. The alkyne 'X' is:

A

Pent-1-yne

B

Pent-2-yne

C

3-Methylbut-1-yne

D

2-Methylbut-1-yne

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1.5 mins

🔄Ncert Concepts :Alkynes, Ozonolysis

Related Questions

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 :Reactivity of Carbon, Hydrogenation, Formation of Hydrocarbons

Common oxidizing agents used in organic chemistry are:

A

Sodium borohydride, Lithium aluminum hydride, Raney nickel, Palladium on carbon

B

Chromium(VI) reagents, Manganese(VII) reagents, Hypervalent iodine reagents, and Peroxyacids

C

Grignard reagents, Organolithium reagents, Gilman reagents, Wittig reagents

D

Hydrochloric acid, Sulfuric acid, Nitric acid, Acetic acid

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Oxidizing agents, Organic chemistry reactions, Potassium permanganate

Which of the following organic compounds exhibit acidic character?

A

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

B

${{\rm{H}}_3}{\rm{C}} - {\rm{C}} \equiv {\rm{C}} - {\rm{C}}{{\rm{H}}_3}$

C

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

D

${{\rm{H}}_3}{\rm{C}} - {\rm{C}}{{\rm{H}}_3}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :acidity, organic compounds, alkynes, alkenes, alkanes, terminal alkynes

Gem dihalides on treatment with alcoholic KOH give

A

Alkyne

B

Alkene

C

Alkane

D

All of these

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Haloalkanes, Elimination Reactions, Dehydrohalogenation

When ${\rm{Ca}}{{\rm{C}}_2}$ was hydrolysed a gas was obtained. It had a garlic odour due to phosgene present as impurity. The gas was passed through ammoniacal solution of ${\rm{C}}{{\rm{u}}_2}{\rm{C}}{{\rm{l}}_2}$ , ared ppt. was obtained. The gas was:

A

Ethylene

B

Propyne

C

Acetylene

D

Ethane

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Hydrolysis, Reaction with ammoniacal cuprous chloride, Identification of alkynes

Which one of the following compounds will react with methyl magnesium iodide?

A

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

B

${\rm{C}}{{\rm{H}}_3}{\rm{CH}} = {\rm{CH}} - {\rm{CH}} = {\rm{C}}{{\rm{H}}_2}$

C

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

D

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

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Grignard reagent, Acid-base reaction, Terminal alkyne

In the series, ethane, ethene and ethyne, the C-H bond energy is

A

Same in all the three compounds

B

Greatest in ethane

C

Greatest in ethene

D

Greatest in ethyne

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :bond energy, bond strength, hybridization, sigma and pi bonds

Formation of acetylene from ethylene is an example of

A

Addition reaction

B

Substitution reaction

C

Elimination reaction

D

Condensation reaction

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Organic Reactions, Elimination Reactions, Addition Reactions, Substitution Reactions, Condensation Reactions

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

Kolbe’s electrolysis of sodium maleate at anode gives

A

Only acetylene

B

Only $C{O_2}$

C

Acetylene + $C{O_2}$

D

$C{O_2} + {H_2}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Hydrocarbons

🎯Topic:Alkynes

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Kolbe's electrolysis, decarboxylation, reaction mechanism, organic chemistry

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