Free Test Alkynes – NEET

Q1: Which of the following is a terminal alkyne?

A. 2-butyne B. 1-butyne C. 3-hexyne D. 2-hexyne

Q2: The number of σ and π bonds in but-2-yne is:

A. 6 σ and 2 π B. 7 σ and 2 π C. 8 σ and 2 π D. 9 σ and 3 π

Q3: Alkynes undergo addition reactions more readily than:

A. Alkanes B. Alkenes C. Aromatics D. Alcohols

Q4: The general formula for alkyne is:

A. CnH2n+2 B. CnH2n C. CnH2n-2 D. CnH2n+1

Q5: Which one is an alkyne?

A. Ethene B. Butane C. Ethyne D. Propane

Q6: Which hybridization exists in carbon atoms in ethyne?

A. sp B. sp2 C. sp3 D. none

Q7: Which reaction gives alkyne from vicinal dihalide?

A. Dehydrohalogenation B. Hydration C. Hydrogenation D. Halogenation

Q8: Which of the following on ozonolysis gives only acetic acid?

A. But-2-yne B. But-1-yne C. Pent-2-yne D. Ethene

Q9: Which of the following is least acidic?

A. Ethene B. Ethyne C. Ethane D. Methane

Q10: Ethyne on reaction with cold dilute alkaline KMnO₄ gives:

A. Oxalic acid B. Acetic acid C. Ethanol D. Ethene

Q11: Which of the following tests confirms the presence of triple bond?

A. Baeyer’s test B. Tollen’s test C. Ammoniacal AgNO₃ test D. Fehling’s test

Q12: Which of the following is formed when ethyne is treated with water in presence of HgSO₄ and H₂SO₄?

A. Ethanol B. Acetaldehyde C. Acetone D. Acetic acid

Q13: Which one of the following alkynes shows geometrical isomerism?

A. But-1-yne B. But-2-yne C. Propyne D. Ethyne

Q14: What is the product when ethyne is hydrogenated?

A. Ethene B. Methane C. Ethanol D. Ethane

Q15: The triple bond in alkynes consists of:

A. 3 σ bonds B. 2 π and 1 σ bonds C. 2 σ and 1 π bonds D. 3 π bonds

Q16: Alkynes react with chlorine in dark to form:

A. Dihalides B. Tetrahalides C. Trihalides D. No reaction

Q17: Which compound is more reactive towards electrophilic addition?