220 -- Which of the following statements is correct?
\={A}) The general formula of polyesters is $\left[\,\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-O-R-O\right]_n$. B) The number of lone pairs of electrons in the bonds of the Teflon monomer is 2. P) Nails and skin of the body are made of natural polymers with functional groups containing atoms C, O, and N. T) The average molar mass of polyethylene obtained from ethylene polymerization is independent of the amount of catalyst used.
(1) \={A}, B (2) \={A}, T (3) B, P (4) P, T
\textbf{220 --} Which of the following statements is correct?
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\noindent \={A}) The general formula of polyesters is $\left[\,\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-O-R-O\right]_n$.
\noindent B) The number of lone pairs of electrons in the bonds of the Teflon monomer is 2.
\noindent P) Nails and skin of the body are made of natural polymers with functional groups containing atoms C, O, and N.
\noindent T) The average molar mass of polyethylene obtained from ethylene polymerization is independent of the amount of catalyst used.
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(1) \={A}, B \qquad (2) \={A}, T \qquad (3) B, P \qquad (4) P, T
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