Q. What is the bond angle around the carbon atoms in an alkyne?
  • A. 120 degrees
  • B. 180 degrees
  • C. 109.5 degrees
  • D. 90 degrees
Q. What is the general formula for alkynes?
  • A. C_nH_(2n+2)
  • B. C_nH_(2n)
  • C. C_nH_(2n-2)
  • D. C_nH_(2n-1)
Q. What is the hybridization of the carbon atoms in an alkyne?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the hybridization of the carbon atoms in ethyne (C2H2)?
  • A. sp
  • B. sp2
  • C. sp3
  • D. dsp3
Q. What is the IUPAC name of the compound CH≡C-CH2-CH3?
  • A. 1-butyne
  • B. 2-butyne
  • C. 1-pentyne
  • D. 3-pentyne
Q. What is the IUPAC name of the compound with the formula C4H6?
  • A. 1-butyne
  • B. 2-butyne
  • C. Cyclobutene
  • D. Butadiene
Q. What is the main feature of terminal alkynes?
  • A. They have a triple bond in the middle
  • B. They can form carbanions
  • C. They are less acidic than alkenes
  • D. They cannot undergo substitution reactions
Q. What is the main feature that distinguishes alkynes from alkenes?
  • A. Presence of double bonds
  • B. Presence of triple bonds
  • C. Saturation
  • D. Molecular weight
Q. What is the main product when 1-butyne is treated with HBr?
  • A. 1-bromobutane
  • B. 2-bromobutane
  • C. 1,2-dibromobutane
  • D. No reaction
Q. What is the main product when 2-butyne is treated with excess H2 in the presence of a catalyst?
  • A. 1-butyne
  • B. Butane
  • C. 2-butyne
  • D. Ethyne
Q. What is the main product when 2-butyne undergoes hydroboration-oxidation?
  • A. Butanol
  • B. Butanal
  • C. Butyric acid
  • D. Butene
Q. What is the major product of the reaction of 2-butyne with H2 in the presence of a catalyst?
  • A. 1-butyne
  • B. butane
  • C. 2-butyne
  • D. 3-butyne
Q. What is the product of the complete combustion of an alkyne?
  • A. CO2 and H2O
  • B. CO and H2O
  • C. C and H2O
  • D. C2H4
Q. What is the product of the complete hydrogenation of 2-butyne?
  • A. 1-butyne
  • B. 2-butyne
  • C. butane
  • D. butyne
Q. What is the product of the reaction between 1-butyne and HBr?
  • A. 1-bromobutane
  • B. 2-bromobutane
  • C. butane
  • D. butyne
Q. What is the product of the reaction of 1-butyne with HBr?
  • A. 1-bromobutane
  • B. 2-bromobutane
  • C. Butane
  • D. Butyne
Q. What type of hybridization is present in alkynes?
  • A. sp
  • B. sp2
  • C. sp3
  • D. s
Q. What type of hybridization occurs in the carbon atoms of alkynes?
  • A. sp
  • B. sp2
  • C. sp3
  • D. s
Q. What type of isomerism is shown by 1-butyne and 2-butyne?
  • A. Structural isomerism
  • B. Geometric isomerism
  • C. Optical isomerism
  • D. Conformational isomerism
Q. Which of the following alkynes is symmetrical?
  • A. 1-butyne
  • B. 2-butyne
  • C. 1-pentyne
  • D. 3-pentyne
Q. Which of the following alkynes is the most acidic?
  • A. Ethylene
  • B. Propyne
  • C. Butyne
  • D. Acetylene
Q. Which of the following alkynes is the most stable?
  • A. 1-butyne
  • B. 2-butyne
  • C. 1-pentyne
  • D. 3-pentyne
Q. Which of the following alkynes is the simplest?
  • A. 1-butyne
  • B. 2-butyne
  • C. Ethyne
  • D. Propyne
Q. Which of the following compounds is an alkyne?
  • A. C2H4
  • B. C3H6
  • C. C4H8
  • D. C5H8
Q. Which of the following compounds is an aromatic alkyne?
  • A. Phenylacetylene
  • B. Propyne
  • C. Ethyne
  • D. 1-butyne
Q. Which of the following compounds is the most acidic?
  • A. Ethylene
  • B. Propene
  • C. Propyne
  • D. Butyne
Q. Which of the following is a characteristic property of alkynes?
  • A. Higher boiling points than alkenes
  • B. Lower reactivity than alkenes
  • C. Inability to undergo addition reactions
  • D. Higher density than alkanes
Q. Which of the following is a terminal alkyne?
  • A. 1-butyne
  • B. 2-butyne
  • C. 1-pentyne
  • D. 3-pentyne
Q. Which of the following is the correct reaction for the hydrogenation of 1-butyne?
  • A. C4H6 + H2 → C4H10
  • B. C4H6 + H2 → C4H8
  • C. C4H6 + H2 → C4H12
  • D. C4H6 + H2 → C4H4
Q. Which of the following is the correct structure for 2-butyne?
  • A. CH3-C≡C-CH3
  • B. CH3-CH≡C-CH3
  • C. CH3-C=C-CH3
  • D. C≡C-CH2-CH3
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