SOLVED

41) Can 1,3,5-hexatriene be considered an aromatic compound? Why do you think so? A) Yes, because it contains alternating double and single bonds. B) No, because the molecule is not a flat ring. C) Yes, because its double bonds contain 4n+2 electrons (n = 1). D) No, because the structure is not based on benzene ring. E) Yes, because the molecule has a delocalized π electron cloud. 42) The terms ortho, meta and para are used to describe the substitution on benzene ring. What do they stand for? A) Ortho stands for two adjacent substituents, meta for two substituents with one carbon between them and para for two substituents with two carbon atoms between them B) Ortho stands for two cis substituents, meta for two trans substituents and para for two opposite substituents. C) Ortho stands for two adjacent substituents, meta for two different adjacent substituents and para for two substituents with one carbon atoms between them D) Ortho stands for two substituents with one carbon atom between them, meta for two substituents with two carbons between them and para for two substituents with three carbon atoms between them E) Ortho stands for two substituents with two carbon atoms between them, meta for two substituents with three carbons between them and para for two substituents with four carbon atoms between them 43) CH3(C=O)CH3 is a(n): A) ether B) ketone C) ester D) aldehyde E) carboxylic acid 44) To produce an ether from methanol, one can use: A) reacting alkene with water in a presence of a strong mineral acid B) alcohol and concentrated H2SO4 C) KOH in alcohol D) Cu, heat E) reacting alcohol with sodium 45) The diol, ethylene glycol, is used extensively as an antifreeze additive in automobile radiators. What properties of ethylene glycol make it a good antifreeze? A) Ethylene glycol coats the radiator to prevent crystallization of ice at low temperatures. B) Ethylene glycol has a higher boiling point than water and is soluble in water. C) Ethylene glycol has a lower boiling point than water and is soluble in water. D) Ethylene glycol forms a film on the surface of the water to prevent ice formation in the radiator. E) Ethylene glycol will remain in the radiator after the water evaporates. This prevents freezing in cold climates. 46) Which class of compounds is the least reactive? A) ethers B) alcohols C) ketones D) alkyl halides E) aldehydes 47) An alcohol of formula C3H8O in which there are only three different kinds of hydrogens is: A) 2-propanol B) 1-propanol C) cyclopropanol D) ethanol E) CH3CH2CH2OH 48) Which methods can be used to prepare alcohols? I) addition of H2O to alkenes in the presence of H2SO4 II) reacting alkanes with a concentrated solution of MOH III) hydrolysis of alkyl halides IV) methanol can be prepared from CO and H2 in the presence of a heterogeneous catalyst V) removing one oxygen atom from a carboxylic acid A) I), II) and IV) B) I), III), and IV) C) II), III), and V) D) I), II), and V) E) II), IV) and V) 49) Choose the INCORRECT statement. A) CH3CH2CH2CH2CH2NH2 is an amine. B) CH3CH2OCH2CH2CH3 is an ether. C) CH3CH2CH2CH2CH2OH is an alcohol. D) O CH3CH2CH2CH2CH is a ketone. E) CH3CH2CH2CH=CH2 is an alkene. 50) Provide names for compounds A, B and C: A) A is 3-chloro-4-methylpentanal, B is meta-chlorophenol and C is 3-(2-methylcyclohexyl)cyclopentanecarboxylic acid B) A is 3-chloro-4-methylpentanol, B is meta-chlorophenol and C is 3-(2-methylcyclohexyl)cyclopentanecarboxylic acid C) A is 3-chloro-4-methylpentanal, B is ortho-chlorophenol and C is 3-(3-methylcyclohexyl)cyclopentanecarboxylic acid D) A is 3-chloro-4-methylpentanon, B is meta-chlorophenol and C is 3-(2-methylcyclohexyl)cyclopentanal E) A is 4-chloro-3-methylpentanal, B is para-chlorophenol and C is 3-(2-methylcyclohexyl)cyclopentanecarboxylic acid