Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 136
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Multiple choice: Which of the following statements is correct? ( ) A. The sum of the masses of the monomers equals the mass of the resulting polymer. B. When the monomer is a single substance, it undergoes addition polymerization. C. In condensation polymerization, there are at least two different substances acting as monomers. D. The repeating units in starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore, they are not isomers. D
Multiple choice: Which of the following statements is correct? (D) A. The sum of the masses of the monomers equals the mass of the resulting polymer. B. When the monomer is a single substance, it undergoes addition polymerization. C. In condensation polymerization, there are at least two different substances acting as monomers. D. The repeating units in starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore, they are not isomers of each other
Answer: D. The repeating units of starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore, they are not isomers of each other.
D. The repeating units of starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore they are not isomers of each other
The correct statement is (D). A. The sum of the masses of the monomers equals the mass of the polymer formed. B. When the monomer is a single substance, it undergoes addition polymerization. C. Monomers in condensation polymerization reactions are at least two different substances. D. The repeating units of starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore, they are not isomers of each other
D. The repeating units of starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore they are not isomers of each other
Multiple choice: Which of the following statements is correct? (D) A. The sum of the masses of the monomers equals the mass of the resulting polymer. B. When the monomer is a single substance, it undergoes addition polymerization. C. In condensation polymerization, there are at least two different substances acting as monomers. D. The repeating units in starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore, they are not isomers of each other
D. The repeating units of starch and cellulose are both C6H10O5, but their degrees of polymerization differ; therefore they are not isomers of each other
Choose D. In option A, the polycondensation reaction produces both high-molecular-weight and low-molecular-weight substances; therefore, the mass resulting from the polycondensation reaction is less than that of the polymer. In option B, a single substance can also undergo polycondensation. In option C, there can be only one type of product in the case of polycondensation
D. It is correct. ----------------------