SOLVED

41) Nitration of aromatic compound I with HNO3/H2SO4 theoretically can give four different products (A – D). In your opinion, which one(s) is(are) formed? Compound I: Possible products: A) products A and C B) products A and D C) only product B D) products C and D E) only product C 42) The chlorination of benzaldehyde is producing: A) m-chlorobenzaldehyde B) a mixture of o and p- chlorobenzaldehyde C) o -chlorobenzaldehyde D) p-chlorobenzaldehyde E) a mixture of m- and p-chlorobenzaldehyde 43) H3C? + ?Cl → H3C?Cl is an example of: A) polymerization B) neutralization reaction C) termination step in alkane chlorination D) addition reaction E) reforming reaction 44) Arrange the following radicals in the order of increasing stability: A) B < A < C B) C < A < B C) A < B < C D) C < B < A E) B < C < A 45) Which of the following steps are a part of chain reaction during alkane substitution? I) Propagation II) Initiation III) Competition IV) Dehalogenation V) Termination A) I), II) and V) B) I), III) and V) C) II), III) and V) D) I), II) and IV) E) III), IV) and V) 46) The initiation step in chain reaction for alkene substitution produces: A) free halogen radicals B) free alkyl radicals C) both free halogen and alkyl radicals D) free halonium ions E) free halide ions 47) Chain reaction polymerization is typical for: A) monomers with carbon-carbon double bonds B) monomers with carbon oxygen double bonds C) monomers containing aromatic rings D) monomeric alkanes E) monomeric alcohols 48) What are the three characteristic steps in a chain-reaction polymerization? A) initiation, elongation and termination B) initiation, propagation and termination C) racemization, propagation and quenching D) propagation, formation and termination E) breaking, elongation and quenching 49) Which of the following statements correctly describe the step-reaction polymerization? I) It is also called condensation polymerization. II) It produces polymers of moderately high molecular masses. III) It requires that monomers have functional groups that can join together. IV) This type of polymerization is fast. V) It is accompanied with the addition of a small molecule. A) I), II) and III) B) I), and II) C) II), III) and IV) D) III), IV) and V) E) II), IV) and V) 50) The physical properties of polymers depend on: I) the average molecular mass of a chain II) the strength of intermolecular forces between the chains III) the reaction temperature applied during synthesis IV) the degree of crystallinity V) the reaction pressure A) I), II), and IV) B) II), III), and IV) C) I), II), and V) D) III), IV), and V) E) II), IV), and V)