Test Questions Chapter 9 Organic Chemistry

The simplest alkane is A) methane. B) ethane. C) monane. D) propane.

A) methane.

Organic chemistry is most broadly defined as A) the chemistry of the non-metallic compounds. B) the chemistry of living systems. C) the chemistry of the compounds of carbon. D) the chemistry of substances produced by living systems.

C) the chemistry of the compounds of carbon.

Carbon is almost always A) monovalent. B) tetravalent. C) trivalent. D) divalent.

B) tetravalent.

The chemical formula of cyclohexane is A) C6H10. B) C6H6. C) C6H8. D) C6H12.

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A compound containing only carbon and hydrogen and which has only single bonds between atoms is classified as an A) aromatic. B) alkane. C) alkene. D) alkyne.

B) alkane.

Alkanes are often called A) saturated fats. B) carbohydrates. C) saturated hydrocarbons. D) unsaturated hydrocarbons.

C) saturated hydrocarbons.

What is the name of the compound with a formula CH3CH2CH2CH3? A) propane B) methane C) ethane D) butane

D) butane

Compounds with the same number and kinds of atoms but with different structures are known as A) isomers. B) allotropes. C) homologs. D) isotopes.

A) isomers.

How many different structural isomers are there for a hydrocarbon with the formula C5H12? A) 1 B) 2 C) 3 D) 4

C) 3

The most unique property of carbon is its ability to A) form four bonds. B) bond to oxygen. C) bond to carbon. D) bond to nitrogen.

C) bond to carbon.

How many different structural isomers are there for a hydrocarbon with the formula C6H14? A) 1 B) 2 C) 3 D) > 4

D) > 4

Approximately what percentage of known compounds are classified as organic compounds? A) Y 70% B) Y 20% C) Y 40% D) Y 95%

D) Y 95%

The unique aspect of a saturated hydrocarbon is that it must contain A) single and double bonds. B) single, double and triple bonds. C) only carbon and hydrogen. D) only single bonds.

D) only single bonds.

An organic compound is best defined as A) a compound of carbon and hydrogen. B) a compound containing carbon. C) a compound produced by a living organism. D) a compound that is NOT produced in a laboratory.

B) a compound containing carbon.

Petroleum jelly is A) a mixture of moderate carbon number hydrocarbons. B) a mixture of higher carbon number hydrocarbons. C) a mixture of low carbon number hydrocarbons. D) none of the above

B) a mixture of higher carbon number hydrocarbons.

The element whose atoms have a unique ability to bond to each other and to other kinds of atoms is ________. A) sulfur B) carbon C) nitrogen D) sodium

B) carbon

The compounds CH3CH3 and CH3CH2CH3 are A) allotropes. B) isotopes. C) homologs. D) isomers

C) homologs.

What is the name of the compound with a formula CH3CH2CH3? A) butane B) ethane C) methane D) propane

D) propane

Which of the following is NOT a reason for the great variety of organic molecules? A) Carbon atoms can form more than four bonds. B) Carbon forms bonds with a variety of elements, including H, O, N, Cl and Br. C) The ability of carbon to form chains D) Isomerism

A) Carbon atoms can form more than four bonds.

What is the name of the compound with a formula CH3CH3? A) ethane B) propane C) butane D) methane

A) ethane