Chemistry Test 1
The chemical formula of hydrogen cyanide is HCN. How many valence electrons are associated with a molecule of hydrogen cyanide?
10
What are the bond angles around the carbon atom bonded to the oxygen atom?
120 degrees
The chemical formula of ethanol CH3CH2OH. How many unshared electron pairs are associated with this molecule?
2
Dodecane is a 12 carbone alkane. How many hydrogen atoms are in dodecane?
26
How many constitutional isomers are possible when there are three identical substituents on a benzene ring?
3
If the bond angles at a carbon atom are 109.5 degrees, how many groups are distributed around the carbon atom?
4
Which of the following observations was troublesome to 19th century chemists?
Benzene did not react similarly to alkenes
Which of the following is the correct molecular formula for heptane?
C7H16
In which of the following or organic compounds is an oxygen atom bonded to a hydrogen atom?
Carboxylic acids
O || The -C- OR group is the functional group of which of the following types of compounds?
Carboxylic esters
In organic compounds, which of the following elements normally forms two covalent bonds?
Oxygen
What is the most specific name for the C6H5-group?
Phenyl
which of the following molecules has a linear structure?
acetylene
Which of the following is the most characteristic reaction of alkenes?
addition
Which of the following classes of compounds can be categorized as primary, secondary, or tertiary?
alcohols
Compounds which contain only carbon-carbon single bonds are classified as which of the following?
alkanes
For which class of compounds does the lack of free rotation around carbon-carbon bonds result in the existence of cis-trans isomerism?
alkenes
a bond angle of approximately of 120 degrees is associated with the carbons in which functional group?
alkenes
Which of the following statements is true about the solubility of alkenes?
all alkenes are soluble in alkanes
Which of the following reactions will consume the most oxygen?
complete combustion of one mile of hexane
Markinov's rule is useful in predicting the outcome for which of the following addition reactions of unsymmetrical alkenes?
hydration
Which of the following reactions involves the addition of two equivalent groups to the two ends of a double bond?
hydrogenation
Which of the following is true of organic compounds?
most are gases, liquids, or low melting solids
Which of the following is a polynuclear hydrocarbon with two rings in a fused arrangement?
napthalene
Which of the following has the highest boiling point?
nonane
Which of the following will dissolve significantly in water?
none of them
Which of the following chemicals, when pure, will have different properties if it is synthesized in the laboratory that if it is obtained from a natural source?
none of these
Which isomer of pentane has the highest boiling point?
pentane
What type of alcohol is formed by the hydration of 1-butene?
secondary
The production of bromopentane by the reaction of pentane with bromine is an example of which type of reaction?
substitution
Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogen atoms?
the alkyne
Which of the following is the characteristic feature of all alkenes?
the presence of one of more carbon carbon double bonds
On what basis was the name aromatic originally given to compounds?
their odors were considered to be pleasant
Which of the following correctly describes the relationship between butane and 2-methylpropane?
they have the same molecular formula
