why is the formation of a condensation polymer impossible in these cases ?
A) ethanoic acid + NH2CH2CH2CH2CH2NH2
B) ethanoic acid+CH3CH2NH2
C) HOOC-CH2-COOH + CH3CH2NH2
A) ethanoic acid + NH2CH2CH2CH2CH2NH2
B) ethanoic acid+CH3CH2NH2
C) HOOC-CH2-COOH + CH3CH2NH2