Organic reagents U6

What reagents will convert an aldehyde to a carboxylate salt? (select more than one answer)

• Tollens' reagent (Ammoniacal silver nitrate)

• Fehling's Solution (CuSO₄ + NaK-tartrate)

• Potassium dichromate(VI) and sulfuric acid

• LiAlH₄ in dry ether

Lithium aluminium hydride in dry ether will... (there might be more than one answer)

• oxidise a secondary alcohol to a carboxylic acid

• reduce a carboxylic acid to a primary alcohol

• reduce a ketone to a secondary alcohol

• oxidise a secondary alcohol to an aldehyde

What reagent will convert ethanol into chloroethane

• PCl₅

• Cl₂

• NaCl

• MgCl₂

What is the name of the major organic product formed by reacting propene with bromine water?

• 1,2-dibromopropene

• 1,2-dibromopropane

• 2,3-dibromopropane

• 1-bromopropan-2-ol

• 2-bromopropan-1-ol

What conditions are best for hydrogenation of an alkene?

• H₂ gas and a Fe catalyst at room temperature

• H₂ gas and a Ni catalyst at 150°C

• H₂ gas and a high pressure and temperature

• Lithium aluminium hydride in dry ether

A primary halogenoalkane undergoes alkaline hydrolysis to form

• A primary alcohol via an S_N1 mechanism

• A primary alcohol via an S_N2 mechanism

• A tertiary alcohol via an S_N1 mechanism

• A tertiary alcohol via an S_N2 mechanism

Propane-1,2-diol can be formed from

• acidified KMnO_4 reacting with propene

• acidified KMnO_4 reacting with 2-oxopropanal

• addition of H₂O₂ to an propene

• hydrolysis of polyethylene terephthalate (PET)

Alkenes and arenes burn with a sooty flame

• true

• false

Bromoalkanes can br formed by the reactions of an alcohol with

• bromine water

• concentrated H₂SO₄ and NaBr

• 50% H₂SO₄ and NaBr

• NaBr in aqueous solution at reflux

Butanenitrile can be formed by reaction of

• 1-chlorobutane with NaCN

• 1-chloropropane with NaCN

• propanal with NaCN and HCN at pH5

• butanal with NaCN and HCN at pH5