ALKENE AND ALKYNE (CHEMICAL PROPERTIES AND PREPARATION)

the major product when 2-pentanol react with concentrated sulphuric acid in 140^oC is

• 1-pentene

• methyl ethyl acetylne

• dimethylethylene

• pent-2-ene

• methylpropylacetylene

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

Reaction between this compound and two mole of H₂ in the presence of Ni catalyst will produce

• 3-methylbutene

• 3-methylbutane

• 2-methylbutane

• 2-methylbutene

• n-butane

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

• aldehyde

• enol

• alcohol

• ketone

• diol

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

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)

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

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

What kind of carbide that you can used, when you want to produce propyne?

• Ca₃C₃

• Mg₃C₃

• Ca₂C₃

• CaC₃

• Mg₂C₃

we better used ............................... as a catalyst to convert alkyne to alkene

• Pt

• Pd

• Pt/BaSO_{4 in quinoline}

• Pt/CaCO_{3 in quinoline}

• Pd/BaSO_{4 in quinoline}