MIDTERM FOR O-CHEM

What is a major difference between inorganic and organic compounds?

a. There are many more inorganic compounds than organic compounds.

b. Organic compounds contain carbon; few inorganic compounds do.

c. Organic compounds are never ionic

d. Organic compounds tend to be more polar than inorganic compounds.

b. Organic compounds contain carbon; few inorganic compounds do.

The vast number of organic compounds is due to the unique chemistry of carbon.

a. formation of long chains.

b. cyclization

c. isomerism

d. more than one answer is correct

d. more than one answer is correct

Identify the correct statement: The alkanes represent one family of organic compounds

a. in which the halogens are a major component

b. in which there is at a least one double bond between carbons

c. that is composed of carbon and hydrogen

d. in which hydrogens can be bonded to other hydrogens

c. that is composed of carbon and hydrogen

Which of the following is an alcohol?

a. CH3CH2COOH

b. CH3CH2OH

c. CH3COCH3

d. CH3CH2Br

b. CH3CH2OH

5. What is meant by the term 'saturated' when describing hydrocarbons?

a. they are saturated with water.

b. The hydrocarbons are saturated with carbons in the skeleton of the compounds.

c. They are saturated with hydrogen and only have single bonds between carbon.

d. The container holding the compound has no other compound/

c. They are saturated with hydrogen and only have a single bonds between carbons.

Which of the following terms applies to the alkanes?

a. hydrophobic

b. hydrophilic

c. soluble

d. bases

a. hydrophobic

7. What is a characteristic shared by alkanes?

a. soluble

b. polar

c. flammable

d. colored

c. flammable

8. Which of the following formulas represents a saturated hydrocarbon?

a. C2H6

b. C2H4

c. C3H6

d. C5H10

a. C2H6

10. Which of the following compounds exhibits structural isomerism?

a. propane

b. methane

c. butane

d. ethane

c. butane

14. the general formula for cycloalkanes is

a. C2H2n+2

b. CnH2n

c. CnH2n+2

d. CnH2n+4

b. CnH2n

17. How many isomers (structural + geometric) exist for dibromocyclopentane. (C5H8Br2)

a. 5

b. 6

c. 4

d. 3

a. 5

18. Alkanes are ____ in water and ____ than water.

a. insoluble, less dense

b. soluble, less dense

c. insoluble, more dense

d. soluble, more dense

a. insoluble, less dense

19. Complete combustion of an alkane produces what products?

a. CO2 and O2

b. CO2 and H20

c. CO and H20

d. C and H20

b. CO2 and H20

21. Organic chemistry can be defined as the chemistry of carbon-containing compounds.

True

Organic compounds are always derived from a living source.

False

Most inorganic compounds have a higher melting point than organic compounds

True

Isomers always have the same empirical formula

True

Carbon atom tends to form tetrahedral structures and carbon is the basis of organic compounds , so, all organic compounds tend to be tetrahedral in shape.

False

Since all alkanes are saturated hydrocarbons, all of the carbon atoms are aligned in one continuous chain.

False

22. Name a difference between a saturated and an unsaturated hydrocarbon.

a. Saturated hydrocarbons are composed of only carbon and hydrogen, and unsaturated hydrocarbons include other atoms than just carbon and hydrogen.

b. Saturated hydrocarbons do not contain multiple bonds between carbons, but unsaturated hydrocarbons do contain multiple bonds.

c. Unsaturated hydrocarbons are flammable but saturated hydrocarbons are not.

d. Saturated hydrocarbons are essentially insoluble. Unsaturated hydrocarbons are soluble.

b. Saturated hydrocarbons do not contain multiple bonds between carbons, but unsaturated hydrocarbons do contain multiple bonds.

23. What number would be used to indicate the double bond position in the IUPAC name for

CH3CH2CH=CHCH3

a. 1

b. 2

c. 3

d. 4

b. 2