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Homework answers / question archive / Multiple-Choice and Bimodal   1)  Hydrocarbons containing only single bonds between the carbon atoms are called __________

Multiple-Choice and Bimodal   1)  Hydrocarbons containing only single bonds between the carbon atoms are called __________

Chemistry

Multiple-Choice and Bimodal

 

1)  Hydrocarbons containing only single bonds between the carbon atoms are called __________.

A) alkenes

B) alkynes

C) aromatics

D) alkanes

E) ketones

 

2)  What general class of compounds is also known as olefins __________?

A) alkenes

B) alkynes

C) aromatics

D) alkanes

E) ketones

 

3)  The simplest alkyne is __________.

A) ethylene

B) ethane

C) acetylene

D) propyne

E) benzene

 

4)  The melting and boiling points of hydrocarbons are determined by __________.

A) ion-dipole attraction

B) dipole-dipole attraction

C) London forces

D) hydrogen bonding

E) ionic bonding

 

5)  Hydrocarbons containing carbon-carbon triple bonds are called __________.

A) alkanes

B) aromatic hydrocarbons

C) alkynes

D) alkenes

E) olefins

 

6)  Alkynes always contain a __________.

A) C=C bond

B) C≡C bond

C) C–C bond

D) C=H bond

E) C≡H bond

 

7)  Alkenes always contain a __________.

A) C=C bond

B) C≡C bond

C) C–C bond

D) C=H bond

E) C≡H bond

 

8)  The molecular geometry of each carbon atom in an alkane is __________.

A) octahedral

B) square planar

C) trigonal planar

D) tetrahedral

E) trigonal pyramidal

 

9)  Hybridization of the carbon atom indicated by (*) in CH3–*CH2–CH3, *CH=CH2, and CH3–C≡CH is __________, __________, and __________, respectively.

A) sp3, sp2, sp

B) sp3, sp, sp2

C) sp, sp2, sp3

D) sp, sp3, sp2

E) sp2, sp3, sp

 

10)  The minimum number of carbons necessary for a hydrocarbon to form a branched structure is __________.

A) 4

B) 6

C) 3

D) 9

E) 12

 

11)  Cyclohexane has __________ fewer hydrogens than n-hexane.

A) 0

B) 1

C) 2

D) 3

E) 4

 

12)  How many structural isomers of heptane exist __________?

A) 2

B) 4

C) 6

D) 8

E) 10

 

13)  The general formula of an alkane is __________.

A) C2nH2n+2

B) CnH2n

C) CnH2n+2

D) CnH2n-2

E) CnHn

 

14)  Alkenes have the general formula __________.

A) CnH2n

B) CnH2n-2

C) CnH2n+2

D) CnHn

E) C2nHn

 

15)  The compound below is an __________.

 

         

 

 

A) alkyne

B) alkene

C) alkane

D) aromatic compound

E) olefin

 

16)  What is the name of the compound below __________?

 

         

 

 

A) 2,4-methylbutene

B) 2,5-dimethylpentane

C) 2,4-ethylbutene

D) 2,4-dimethyl-1-pentene

E) 2,4-dimethyl-4-pentene

17)  Alkanes with __________ to __________ carbons are found in straight-run gasoline.

A) 2, 3

B) 5, 12

C) 1, 5

D) 9, 15

E) 20, 60

 

18)  Gasoline and water do not mix because gasoline is __________.

A) less dense than water

B) less viscous than water

C) nonpolar and water is polar

D) volatile and water is not

E) polar and water is nonpolar

 

 

19)  Which substance would be the most soluble in gasoline __________?

A) water

B) NaNO3

C) HCl

D) hexane

E) NaCl

 

22)  The name of CH3–CH=C=CH-CH–CH=CH–CH3 is __________.

A) 2, 3, 5 - octatriene

B) 2, 5, 6 - octatriene

C) 2, 3, 6 - octatriene

D) 3, 5, 6 - octatriene

E) 3, 4, 7 - octatriene

23)  __________ could be the formula of an alkene.

A) C3H8

B) C3H6

C) C6H6

D) C17H36

E) CH8

 

24)  In general, __________ are the most reactive hydrocarbons.

A) alkenes

B) alkynes

C) alkanes

D) cycloalkanes

E) olefins

 

26)  Aromatic hydrocarbons __________.

A) readily undergo addition reactions like alkenes

B) contain a series of π bonds on several consecutive carbon atoms

C) undergo substitution reactions more easily than saturated hydrocarbons

D) have sp2 hybridized carbon atoms

E) are stabilized by resonance

 

27)  How many hydroxyl groups are in a glycerol molecule __________?

A) 0

B) 1

C) 2

D) 3

E) 4

 

28)  The general formula for an ether is __________.

A) R–O–R'

B) R–CO–R'

C) R–CO–OH

D) R–OH

E) R–CO–H

30)  The general formula of an aldehyde is __________.

A) R–O–R'

B) R–CO–R'

C) R–CO–OH

D) R–CHO

E) R–CO–OR'

 

31)  The general formula of a carboxylic acid is __________.

A) R–O–R'

B) R–CO–R'

C) R–CO–OH

D) R–H

E) R–CO–OR'

 

32)  Carboxylic acids can be formed by oxidation of __________.

A) alkenes

B) benzene

C) ketones

D) primary alcohols

E) alkynes

 

33)  The general formula of an ester is __________.

A) R–O–R'

B) R–CO–R'

C) R–CO–OH

D) R–OH

E) R–CO–OR'

 

34)  CH3CH2C(=O)NH2 is called a(n) __________.

A) amine

B) amide

C) ketone

D) aldehyde

E) ester

35)  The compound below is a(n) __________.

 

         

 

 

A) carboxylic acid

B) ketone

C) aldehyde

D) ester

E) amine

 

36)  The hybridization of the central carbon atom in an aldehyde is __________.

A) sp

B) sp3

C) sp2

D) d2sp3

E) sp4

 

37)  Optically active molecules that are mirror images of each other are called __________.

A) allotropes

B) geometrical isomers

C) enantiomers

D) cofactors

E) chiral compounds

 

38)  Starch, glycogen, and cellulose are made of repeating units of __________.

A) lactose

B) glucose

C) fructose

D) sucrose

E) amino acids

 

39)  Which one of the following could be a cyclic alkane?

A) C5H5

B) C3H6

C) C4H6

D) C2H6

E) C9H20

40)  How many isomers are possible for C4H10?

A) 1

B) 2

C) 3

D) 4

E) 10

 

41)  How many isomers are possible for C5H12?

A) 1

B) 2

C) 3

D) 4

E) 10

 

42)  What type of compound has been used to replace tetraethyl lead ((C2H5)4Pb) as an antiknock agent in gasoline?

A) aromatic compounds

B) olefins

C) fluorochlorocarbons

D) paraffins

E) oxygenated hydrocarbons

43)  How many structural isomers (include all types except optical) can be drawn for C5H10?

A) 5

B) 6

C) 7

D) 11

E) 12

 

44)  Alcohols are hydrocarbon derivatives in which one or more hydrogens have been replaced by a hydroxyl functional group. __________ is the general formula of an alcohol.

A) R–O–R

B) R–CO–R

C) R–CO–OH

D) R–OH

E) R–CO–H

 

45)Which statement(s) is(are) true?

A) none

B) (i) and (ii)

C) (iii) only

D) (i), (ii), and (iv)

E) all

 

46)  Which one of the following is not an alcohol?

A) acetone

B) glycerol

C) ethanol

D) cholesterol

E) ethylene glycol

 

 

47)  Which one of the following compounds is an isomer of CH3CH2CH2CH2OH?

A) CH3CH2CH2OH

 

B)

 

 

 

C)

 

 

 

D)

 

 

 

E) CH3OH

 

48)  What is the general formula for a ketone?

A) R–O–R

B) R–CO–R'

C) R–CO–OH

D) R–OH

E) R–CHO

 

49)  Of the compounds below, __________ is an isomer of

 

         

 

 

A)

 

 

 

B)

 

 

 

C)

 

 

 

D)

 

 

 

E)

 

 

 

50)  Which structure below represents a ketone?

A)

 

 

 

B)

 

 

 

C)

 

 

 

D)

 

 

 

E)

 

 

 

51)  Which structure below represents an aldehyde?

A)

 

 

 

B)

 

 

 

C)

 

 

 

D)

 

 

 

E)

 

 

 

52)  Which structure below represents an ether?

A)

 

 

 

 

 

 

 

B)

 

 

 

C)

 

 

 

D)

 

 

 

E)

 

 

 

 

53)  Which of the following compounds does not contain a C=O bond?

A) ketones

B) aldehydes

C) esters

D) amides

E) ethers

54)  Which one of the following molecules is chiral?

 

A)

 

 

 

B)

 

 

 

 

C)

 

 

 

D)

 

 

 

 

E)

 

 

 

 

55)  How many chiral carbon atoms does the neopentane (2,2 - dimethylpropane) have?

A) 0

B) 1

C) 2

D) 3

E) 4

 

56)  Sugars are examples of what type of molecule?

A) proteins

B) carbohydrates

C) nucleic acids

D) amino acids

E) salts

 

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