Biodegradable polymers

38 questions on Biodegradable polymers from the Polymers chapter: 6 NEET level, 16 JEE Main, 16 JEE Advanced. Each one opens with its answer and solution.

• Nylon 2-nylon 6 is a biodegradable copolymer of glycine and NEET level
• PHBV, a biodegradable polyester, is a copolymer of NEET level
• Which of the following is a biodegradable polymer? NEET level
• PHBV is best described as JEE Main level
• In nylon 2-nylon 6 the numbers 2 and 6 refer to JEE Main level
• Poly(lactic acid) has the repeat unit -[O-CH(CH3)-CO]- (C3H4O2; C 12, H 1, O 16). A PLA sample has molar mass 36000 g mol^-1. Neglecting end groups, its degree ... JEE Main level
• The monomer of polyglycolic acid (PGA) is JEE Main level
• The main structural reason why PHBV and nylon 2-nylon 6 are biodegradable is that JEE Main level
• Assertion (A): PHBV is a condensation polymer. Reason (R): It is formed by joining hydroxy acid molecules through ester links with loss of water. JEE Main level
• Match the polymer (List I) with its monomer(s) (List II) List I: P PHBV; Q nylon 2-nylon 6; R PLA; S PGA List II: 1 glycine and 6-aminohexanoic acid; 2 lactic a... JEE Main level
• A linear polyester chain is made from 100 hydroxy-acid molecules (any mixture of 3-hydroxybutanoic and 3-hydroxypentanoic acid), each joining only through its -... JEE Main level
• Which of the following statements about biodegradable polymers are correct? JEE Advanced level
• PHBV contains two kinds of repeat units: -[O-CH(CH3)-CH2-CO]- (HB, C4H6O2) and -[O-CH(C2H5)-CH2-CO]- (HV, C5H8O2). Which statements are correct (C 12, H 1, O 16... JEE Advanced level
• On complete hydrolysis, which of the following polymers give the products listed? JEE Advanced level
• Take the repeat unit of nylon 2-nylon 6 as one glycine residue plus one 6-aminohexanoic acid residue, -[NH-CH2-CO-NH-(CH2)5-CO]- (C8H14N2O2). Which statements a... JEE Advanced level
• Poly(lactic acid), -[O-CH(CH3)-CO]_n- (72 g/mol per unit), is made by polycondensation of lactic acid, CH3CH(OH)COOH (90 g/mol). For a very long chain (end grou... JEE Advanced level
• Nylon 2-nylon 6 is made from glycine and 6-aminohexanoic acid, H2N-(CH2)5-COOH (131 g/mol), in 1 : 1 ratio. The repeat unit -[NH-CH2-CO-NH-(CH2)5-CO]- has a mas... JEE Advanced level
• A PHBV chain contains HB and HV units in a 4 : 1 mole ratio. HB is -[O-CH(CH3)-CH2-CO]- (86 g/mol) and HV is -[O-CH(C2H5)-CH2-CO]- (100 g/mol). Neglecting end g... JEE Advanced level
• Nylon 2-nylon 6 has a repeat unit -[NH-CH2-CO-NH-(CH2)5-CO]- of molar mass 170 g/mol and contains two amide bonds per repeat unit. The mass of water needed to h... JEE Advanced level
• Which of the following statements about PHBV is/are correct? (One or more options may be correct.) JEE Advanced level
• Nylon 2-nylon 6 is a biodegradable polymer made from NEET level
• A PLA sample has weight-average molar mass M_w=2.40x10^5 g/mol and PDI =M_w/M_n=2.0. With the repeat unit -[O-CH(CH3)-CO]- of 72 g/mol and ignoring end groups, ... JEE Advanced level
• A PHBV chain contains 90 mol percent 3-hydroxybutanoate units (C4H6O2) and 10 mol percent 3-hydroxypentanoate units (C5H8O2). Taking C 12, H 1, O 16 and ignorin... JEE Advanced level
• The repeat unit of nylon 2-nylon 6 is -[NH-CH2-CO-NH-(CH2)5-CO]-. Its molar mass (C 12, H 1, N 14, O 16) is JEE Main level
• Match the biodegradable polymer in Column I with the monomer(s) in Column II. Column I: (P) PLA, (Q) PGA, (R) PHBV, (S) nylon 2-nylon 6. Column II: (1) hydroxye... JEE Advanced level
• Which of the following biodegradable polymers is a copolymer? JEE Main level
• Polyglycolic acid (repeat unit -[O-CH2-CO]-, 58 g/mol) is made from hydroxyethanoic acid (76 g/mol). Ignoring end groups, the mass of hydroxyethanoic acid neede... JEE Main level
• Ring-opening polymerisation of lactide (the cyclic dimer of lactic acid) gives JEE Main level
• Which statement(s) about nylon 2-nylon 6 is/are correct? (One or more options may be correct.) JEE Advanced level
• Which of the following is a biodegradable polymer? NEET level
• Assertion (A): Complete hydrolysis of nylon 2-nylon 6 gives two different amino acids. Reason (R): The polymer chain consists of alternating glycine and 6-amino... JEE Advanced level
• A linear polyglycolic acid chain contains 50 units derived from hydroxyethanoic acid (one terminal -OH and one terminal -COOH). The number of water molecules ne... JEE Main level
• Polylactic acid (PLA) has the repeat unit -[O-CH(CH3)-C(=O)]-. A PLA sample has molar mass 108500 g/mol. Taking C 12, H 1, O 16 and ignoring end groups, calcula... JEE Main level
• PLA is prepared from lactic acid. The monomer and the type of linkage are JEE Main level
• Complete hydrolysis of which of the following polymers gives products that each contain both a hydroxyl group and a carboxylic acid group? (One or more options ... JEE Advanced level
• Using C 12, H 1, O 16 and N 14, which of the following repeat-unit molar masses is/are correct? (One or more options may be correct.) JEE Advanced level
• PHBV is a copolymer of NEET level
• Complete hydrolysis of PHBV gives JEE Main level