Question

Match the polymers given in column I with monomers in column II and mark the appropriate choice.

• A. (A) $\to$ (iv), (B) $\to$ (ii), (C) $\to$ (i), (D) $\to$ (iii)
• B. (A) $\to$ (i), (B) $\to$ (iii), (C) $\to$ (iv), (D) $\to$ (ii)
• C. (A) $\to$ (iv), (B) $\to$ (i), (C) $\to$ (ii), (D) $\to$ (iii)
• D. (A) $\to$ (ii), (B) $\to$ (iv), (C) $\to$ (iii), (D) $\to$ (i)

Answer 1

The correct option is C (A) $\to$ (iv), (B) $\to$ (i), (C) $\to$ (ii), (D) $\to$ (iii)

Melamine formaldehyde polymer- (iv) melamine+formaldehyde

Bakelite - (i) phenol + formaldehyde

Neoprene - (ii) 2-chloro 1,3 butadiene (Chloroprene)

Natural rubber - (iii) 2-methyl 1,3 butadiene (isoprene)

Formation of phenol-formaldehyde polymer-

These are obtained by the condensation reaction of phenol with formaldehyde in the presence of either an acid or a base catalyst. The reaction starts with the initial formation of o-and/or p-hydroxymethyl phenols derivatives, which further react with phenol to form compounds having rings joined to each other through –$C{H}_2$ groups. The initial product could be a linear product like novolac.

The correct option is $\left[C\right]$.