Question

Which of the following is not a natural polymer?

• A. Proteins
• B. Polysaccharides
• C. Cotton
• D. Phenol- formaldehyde

Answer 1

Answer: (D)

Phenol- formaldehyde

• Proteins are polymers of amino acids which found in living organisms. Hence, proteins are natural polymer.
  
• Polysaccharides are polymers of monosaccharides such as glucose, fructose & glyceraldehyde which are naturally occuring in living organisms.
  
• Cotton is composed of pure cellulose, a naturally occuring polymer.
  
• Phenol-formaldehyde is a synthetic polymer obtained by reaction of phenol with formaldehyde.