Ans. The no. of 6, 6 in nylon-6, 6 implies that both the monomers of nylon-6, 6 namely hexamethylene diamine and adipic acid contain six carbon atom each. The no. of 6 in nylon-6 contains six carbon atom each. The no. of 6 in nylon-6 indicates that its monomer Caprolectum has six carbon atom in its molecule.