Many naturally occurring organic compounds contain oxygen. Such compounds may contain
alcohol, aldehyde, carboxylic acid, ester or ketone functional groups. These functional groups
may be identifi ed by their reactions with specifi c reagents.
Compound F is a white solid which has the molecular formula C3H6O3.
Compound F is soluble in water. Addition of NaHCO3 to this solution produces a colourless
gas, G, which turns lime water milky.
(a) (i) What is the identity of the gas G?