Quiz  /  Alkyne Class 11 MCQ Questions With Answers

  • 1. 
    What is the product when propyne react with two mole HOCl (hypohalaus acid)

  • aldehyde (2,2-dichloropropanal)
  • 1-chloro-2-propanol
  • 2-chloro-1-propanol
  • ketone (1,1-dichloro-2-propanone)
  • alcohol (1,1-dichloro-2-propanol)

  • 2. 
    Why do alkane not dissolve in water?

  • they are less dense than water
  • they have low melting points
  • they are non-polar molecule
  • they are chemically not reactive

  • 3. 
    Which statement is not true about preparation of alkene?

  • we can produce 1-butene by addition of hydrogen to alkane
  • alkene can be produced by dehydrohalogenation of alkyl halide by using alcoholic base
  • Lindlar's catalyst is the catalyst that we can used to produced alkene from alkyne by reaction with hydrogen
  • dehydration of alcohol to produce alkene is kind of elimination reaction
  • addition of one mol hydrogen to 2-propyne will produce 1-propene

  • 4. 
    What is the prefix for a compound with 7 carbons?

  • Hex
  • Hept
  • Hesp
  • Hexa

  • 5. 
    Name the reaction of ethene reacted with oxygen?

  • combustion
  • hydrogenation
  • oxidation

  • 6. 
    What kind of alkyl halide that we can used when we want to convert 1-propyne to 2-hexyne?

  • 1-chloropropane
  • 1-chlorobutane
  • 2-chloropropane
  • 2-propane
  • n-propane

  • 7. 
    Which compound produce more sooty flame?

  • alkene
  • alkane

  • 8. 
    Is salt (NaCl) an organic compound?

  • Yes
  • No
  • Maybe

  • 9. 
    The result of this reaction is

  • 2,2-dichloro-4,6-dimethyloctane
  • 1,2-dichloro-4,6-dimethyloctane
  • 2,2-dichloro-6-ethyl-4-methylhexane
  • 1,2-dichloro-6-ethyl-4-methylhexane
  • 2,2-dichloro-4,6-dimethylheptane

  • 10. 
    What kind of alkyne that we can obtained, when we react 1,2-dichlorobutane with 2 mole NaNH2?

  • but-1-yne
  • but-2-yne
  • but-3-yne
  • no alkyne is obtained
  • 1,2-butadiyne

  • 11. 
    The major product when 2-pentanol react with concentrated sulphuric acid in 140oC is

  • 1-pentene
  • methyl ethyl acetylne
  • dimethylethylene
  • pent-2-ene
  • methylpropylacetylene

  • 12. 
    We better used ............................... as a catalyst to convert alkyne to alkene

  • Pt
  • Pd
  • Pt/BaSO4 in quinoline
  • Pt/CaCO3 in quinoline
  • Pd/BaSO4 in quinoline

  • 13. 
    How many carbon atoms are in decane?

  • 4
  • 6
  • 8
  • 10

  • 14. 
    Reaction between butyne with H2O in the presence of HgSO4 and H2SO4 as catalyst will produce?

  • aldehyde
  • enol
  • alcohol
  • ketone
  • diol

  • 15. 
    What is the molecular formula of butene?

  • C4H4
  • C4H6
  • C4H8
  • C4H10

  • 16. 
    What is the attractive force between the hydrocarbon carbon compounds called?

  • Covalent
  • Intermolecular
  • Intramolecular
  • Ionic

  • 17. 
    What is solubility of alkane, alkene and alkyne ?

  • soluble in water, insoluble in organic solvent
  • insoluble in water , soluble in organic solvent
  • soluble in water and organic solvent

  • 18. 
    Which of the following statements concerning the reaction of methane with bromine under the sunlight are correct?I. It is an addition reaction.II. It is a substitution reaction.III. The end product is tetrachloromethane.IV. A similar reaction will occur if propane is used instead of methane.

  • I and IV only
  • II and III only
  • I, III and IV only
  • II, III and IV only

  • 19. 
    Which of the following substances has the highest boiling point?

  • heptane
  • pentane
  • nonane

  • 20. 
    How many bonds can C form?

  • 2
  • 3
  • 4
  • 5

  • 21. 
    What happen to bromine water when react with ethene?

  • Orange solution turns green
  • Purple solution turn colourless
  • Brown solution turn colourless
  • Pink solution turn colourless

  • 22. 
    Why alkane, alkene and alkyne cannot conduct electricity?

  • they exist as neutral molecule
  • do not have free moving ion
  • easily evaporates
  • Both A & B

  • 23. 
    Propene reacts with steam to produce alcohol. What are the condition required to produce optimum product?

  • the presence of concentrated phosphoric acid as catalyst at temperature 300°C and pressure 60 atm
  • the presence of concentrated sulphuric acid as catalyst at room temperature
  • the presence of nikel as catalyst at temperature 180°C
  • the presence of ultraviolet
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