Hydrocarbons

The reagent used to convert an alkyne to alkene is

• Zn/HCl

• Sn/HCl

• Zn-Hg/HCl

• Pd/H₂

n-propyl bromide on treating with alcoholic KOH produces

• propane

• propene

• propyne

• propanol

The IUPAC name for tertiary butyl iodide is

• 4-iodo butane

• 2-iodo butane

• 1-iodo-3-methyl propane

• 2-iodo-2-methyl propane

The electrophile involved in the sulphonation of benzene is

• SO${}_3^{+}$

• SO${}_3^{2-}$

• H${}_3^{+}$O

• SO₃

The carbon-carbon bond length in benzene is

• in between C₂H₆ and C₂H₄

• same as in C₂H₄

• in between  C₂H₆ and C₂H₂

• in between C₂H₄ and C₂H₂

Which one of these is not true for benzene?

• It forms only one type of monosubstituted product

• There are three carbon-carbon single bonds and three carbon-carbon double bonds

• The heat of hydrogenation of benzene is less than the theoretical value

• The bond angle between the carbon-carbon bonds is 120°

Which one of the following conformations of cyclohexane is the least stable?

• Half-chair

• Boat

• Twisted-boat

• Chair

Which one of these is not true for benzene?

• It forms only one type of monosubstituted product

• There are three carbon-carbon single bonds and three carbon-carbon double bonds

• Heat of hydrogenation of benzene is less than its theoretical value

• The bond angle between carbon-carbon bonds is 120°

A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is

• 1, 1-dibromopropane

• 2, 2-dibromobutane

• 1, 2-dibromoethane

• 1, 4-dibromobutane

Which one of the following is an intermediate in the reaction of benzene with CH₃Cl in the presence of anhydrous AlCl₃?

• Cl^-

• CH${}_3^{-}$

• CH${}_3^{+}$

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