Aldehydes (CnH2nO)

Question 1

Reduction of aldehydes to primary alcohols. EXAMPLE AND CONDITIONS.

Answer 1

Propanal+2[H]—>Propanol.
Conditions= NaBH4(aq) or LiAlH4(ether).

Question 2

HCN+Aldehydes—>2-hydroxynitriles. EXAMPLE AND CONDITIONS.

Answer 2

HCN+Propanal—>2-hydroxybutanenitrile.
Conditions= KCN(aq) catalyst.

Question 3

Aldehyde production method (with conditions).

Answer 3

Oxidation of primary alcohol. Reflux under heat, then distill.

Question 4

Aldehyde reactions.

Answer 4

Reduction of aldehydes to primary alcohols.
Oxidation of aldehydes to carboxylic acids.
HCN+Aldehydes—>2-hydroxynitriles.

Question 5

Oxidation of aldehydes to carboxylic acids. EXAMPLE AND CONDITIONS.

Answer 5

Propanal+2[O]—>Propanoic acid+H2O.
Conditions= H+/KMnO4(VII) or H+/K2Cr2O7(VI).