Aldehydes, Ketones and Carboxylic Acids

Product will be:
How can you change propane nitrile to propanal?
Write the structural and IUPAC name of acetal.
Can be distinguished by
The enthalpy of neutralisation of oxalic acid by a strong base is $$-25k.cal{mol}^{-1}$$. The enthalpy of dissociation of 
$${H}_{2}{C}_{2}{O}_{4}\rightleftharpoons  2{H}^{+}+{C}_{2}{O}_{4}^{2-}$$