Which of the following statements are correct? (i) A polyamide nylon 6,6 prepared by the condensation polymerisation of hexamethylene diamine with adipic acid is used in the manufacture of tyre cords. (ii) Terylene is crease resistant and is blended with cotton and wool fibres for various applications. (iii) Condensation reaction of phenol and formaldehyde to form novolac can be catalysed either by acid or base. (iv) Melamine formaldehyde polymer is mainly used in the manufacture of electrical switches.

Question

Which of the following statements are correct? (i) A polyamide nylon 6,6 prepared by the condensation polymerisation of hexamethylene diamine with adipic acid is used in the manufacture of tyre cords. (ii) Terylene is crease resistant and is blended with cotton and wool fibres for various applications. (iii) Condensation reaction of phenol and formaldehyde to form novolac can be catalysed either by acid or base. (iv) Melamine formaldehyde polymer is mainly used in the manufacture of electrical switches. (A) (i), (ii) and (iii) (B) (ii), (iii) and (iv) (C) (iii) and (iv) (D) (ii) and (iii)

Tardigrade Admin · Accepted Answer

Nylon-6 is used in the manufacturing of tyre cords while nylon-6,6 is used in making sheets, bristles for brushes and in textile industry. Melamine-formaldehyde polymer is used in the manufacture of unbreakable crockery.