CHM 210 Chemistry Homework #6 Alkanes (Ch. 10) Due: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Compounds that have the same molecular formula but different arrangements of atoms are called A) indicators. B) isozymes. C) isotopes. D) isometrics. E) isomers. 2) A formula that shows the arrangement of all bonds in a molecule is called a(n) A) condensed molecular formula. B) condensed structural formula. C) molecular formula. D) expanded structural formula. E) isomeric formula. 3) A hydrocarbon contains only the elements A) carbon and hydrogen. B) carbon, hydrogen, and nitrogen. C) carbon and oxygen. D) carbon, hydrogen, and oxygen. E) hydrogen and oxygen. 4) The functional group contained in the compound CH3-CH2-OH is a(n) A) alkene. B) aldehyde. C) alcohol. D) ketone. E) ether. 5) What type of compound is CH3CH2CH2Cl? A) branched alkane B) alkane C) isomer D) haloalkane E) cycloalkane 6) What is the name of this compound? CH3 - Cl CH - CH2 - CH 2 - Cl A) 1,1-dichlorobutane B) 1,3-dichlorobutane C) 1,2,-dichlorobutane D) dichlorobutane E) 1,4-dichlorobutane 1
7) The special feature that determines the family name and chemical reactivity of the organic compound it is found in is called a(n) A) functional group. B) ionic bond. C) organic compound. D) covalent bond. E) identifying group. 8) A functional group is a certain group of atoms that A) changes the color of the molecule whenever present. B) always contains oxygen or nitrogen. C) never contains a halogen. D) increases water solubility. E) reacts in a predictable way whenever present. 9) An alkene is a carbon compound that contains a bond. A) hydrogen B) single C) triple D) aromatic E) double 10) The functional group contained in the compound is a(n) A) alkene. B) aldehyde. C) alcohol. D) ketone. E) ether. 11) The functional group contained in the compound CH3-CH2-O-CH2 -CH3 is a(n) A) ether. B) alkene. C) alcohol. D) ketone. E) aldehyde. 12) The functional group contained in the compound is a(n) A) amide. B) thiol. C) ester. D) amine. E) carboxylic acid. 13) The functional group contained in the compound is a(n) A) amine. B) carboxylic acid. C) thiol. D) amide. E) ester. 14) The functional group contained in the compound CH3-CH2-NH2 is a(n) A) ester. B) thiol. C) carboxylic acid. D) amine. E) amide. 2
15) How many valence electrons does carbon have? A) four B) two C) one D) three E) five 16) Carbon atoms always have how many covalent bonds? A) five B) one C) four D) two E) three 17) Identify the functional group in the compound CH3-CH2-SH. A) thiol B) amide C) ester D) ketone E) secondary amine 18) The carbon atoms in saturated hydrocarbons A) contain at least one triple bond. B) have only single bonds. C) contain a benzene ring. D) contain both a double and a triple bond. E) contain at least one double bond. 19) Which of these formulas is the expanded structural formula for an alkane with three carbon atoms? A) H H H H - C - C - C - H H H H B) C - C - C C) C3H8 D) CH3- CH2- CH3 E) C3H6 20) What is the name of the continuous chain alkane with six carbon atoms? A) heptane B) butane C) pentane D) hexane E) octane 21) What is the name of this compound? CH3- CH2- CH2- CH2- CH2- CH2- CH3 A) pentane B) heptane C) hexane D) butane E) octane 22) What is(are) the product(s) of the complete combustion of any hydrocarbon? A) CO2 only B) H2O only C) CO + H2O D) CO2 + H2O E) CO only 23) What is the name of the alkyl group CH3- CH2- CH2-? A) propane B) methyl C) propyl D) ethane E) ethyl 3
24) What is the IUPAC name for this alkane? CH3 - CH2 - CH3 CH - CH - CH2 - CH3 CH3 A) 3, 4-dimethylhexane B) 2-ethyl-3-methylpentane C) octane D) 2, 3-diethylbutane E) 4-ethyl-3-methylpentane 25) What is the name of? CH3 A) hexane B) 2-dimethylbutane C) 3,3-dimethylbutane D) 2,2-dimethylbutane E) dimethylbutane 26) A cycloalkane A) has two fewer carbon atoms than the corresponding alkane. B) has no hydrogen atoms. C) has two fewer hydrogen atoms than the corresponding alkane. D) contains - CH3 groups joined by single bonds. E) always contains a three carbon ring. 27) The reaction for the combustion of heptane is C7H16 + 11O2 7CO2 + 8H2O. How many liters of CO2 at STP are produced from the complete combustion of 2.00 moles of heptane? A) 157 L B) 314 L C) 246 L D) 22.4 L E) 44.8 L 28) What is the name for a two-carbon saturated alkyl group? A) butyl B) ethyl C) methyl D) pentyl E) propyl 29) What is the name for this three-carbon alkyl group? CH3 - CH - CH3 A) iso-propyl B) iso-butyl C) butyl D) n-propyl E) ethyl 4
30) What is the name for an eight-carbon continuous-chain alkane? A) octane B) nonane C) heptane D) decane E) hexane 31) According to the IUPAC convention for chemical naming, which part of a hydrocarbon is selected as the main chain for a hydrocarbon chain? A) the longest continuous chain, regardless of bends B) the most highly branched chain C) the longest chain drawn in a straight line D) the chain with the most substituted carbons in it E) the shortest chain 32) According to the IUPAC convention, alkyl group names should be located of the name of the main chain. A) in the middle B) at the end C) in front 33) According to the IUPAC convention, alkyl substituents on a hydrocarbon chain should be listed in which order? A) alphabetical including prefixes B) alphabetical without considering prefixes C) in order with the substituent having the lowest number of carbons first D) in order with the substituent having the highest number of carbons first E) in order with the substituent having the highest total number of carbons first 34) When drawing a structural formula, the first step is to draw A) the most highly substituted carbons. B) the functional group. C) the main carbon chain. D) the substituents. E) the saturated carbons. MATCHING. Choose the item in column 2 that best matches each item in column 1. Identify the following as more characteristic of an organic compound or an inorganic compound. 35) high melting point A) inorganic 36) flammable B) organic 37) covalent bonds 38) insoluble in water 39) ionic bonds 5
Match the following organic structures with the appropriate family name. 40) CH3-CH2-CH=CH2 A) alkene 41) O CH3 - C - CH3 B) ketone C) alcohol 42) CH3-OH 43) O CH3-CH2 -C -O-H D) carboxylic acid E) ether 44) CH3-CH2-O-CH2-CH3 6
Answer Key Testname: HOMEWORK 6 CH 10 1) E 2) D 3) A 4) C 5) D 6) B 7) A 8) E 9) E 10) B 11) A 12) A 13) B 14) D 15) A 16) C 17) A 18) B 19) A 20) D 21) B 22) D 23) C 24) A 25) D 26) C 27) B 28) B 29) A 30) A 31) A 32) C 33) B 34) C 35) A 36) B 37) B 38) B 39) A 40) A 41) B 42) C 43) D 44) E 7