Question 1

Which of the following best describes a saturated hydrocarbon?

Accepted Answer

A compound containing only single bonds between carbon atoms and the maximum number of hydrogen atoms.

Question 2

What is the general molecular formula for a straight-chain alkane with $$n$$ carbon atoms?

Accepted Answer

$$C_nH_{2n+2}$$

Question 3

Which of the following statements about alkanes is FALSE?

Accepted Answer

Alkanes are polar compounds due to the difference in electronegativity between carbon and hydrogen.

Question 4

A compound has the molecular formula $$C_5H_{12}. $$Which of the following is true?

Accepted Answer

It could have structural isomers with different connectivity of carbon atoms.

Question 5

Which of the following is the correct IUPAC name for a molecule with a four-carbon straight chain and a chlorine atom attached to the second carbon?

Accepted Answer

2-chlorobutane

Question 6

Which functional group is present in all alkenes?

Accepted Answer

A carbon–carbon double bond

Question 7

What is the main difference between structural isomers and conformational isomers?

Accepted Answer

Structural isomers have different connectivity of atoms, while conformational isomers have the same connectivity but differ in spatial arrangement due to rotation around single bonds.

Question 8

Which of the following best describes a chiral center in an organic molecule?

Accepted Answer

A tetrahedral carbon atom bonded to four different atoms or groups.

Question 9

Which of the following statements about cis–trans isomerism in alkenes is correct?

Accepted Answer

Cis–trans isomerism occurs when each carbon of the double bond has two different groups attached.

Question 10

A molecule has the following condensed formula: $$CH_3CH_2CH_2CH_3. $$What is its IUPAC name?

Accepted Answer

Butane

Question 11

Which of the following is a property of aromatic compounds such as benzene?

Accepted Answer

They are unusually stable due to resonance and resist reactions that would break double bonds.

Question 12

Which of the following best describes the difference between a cycloalkane and a straight-chain alkane with the same number of carbons?

Accepted Answer

A cycloalkane has two fewer hydrogen atoms than the corresponding straight-chain alkane.

Question 13

Which of the following is a correct statement about fatty acids?

Accepted Answer

Saturated fatty acids do not contain double bonds and have a carboxylic acid group at one end.

Question 14

Which of the following is a correct step in naming a branched-chain alkane according to IUPAC rules?

Accepted Answer

Identify the longest continuous chain of carbon atoms as the parent chain.

Question 15

Which of the following is a real-world consequence of chirality in pharmaceuticals?

Accepted Answer

One enantiomer of a drug may be beneficial, while the other may be harmful or inactive.

Question 16

Which of the following is a correct description of a functional group?

Accepted Answer

A group of atoms bonded in a particular way that determines the chemical reactivity of an organic molecule.

Question 17

Which of the following is a correct statement about the combustion of alkanes?

Accepted Answer

Complete combustion of alkanes produces carbon dioxide and water.

Question 18

Which of the following is a correct statement about the use of 'R' in organic chemistry?

Accepted Answer

'R' represents the rest of the molecule bonded through carbon, allowing focus on the functional group.

Question 19

Which of the following is a correct statement about polycyclic aromatic hydrocarbons (PAHs)?

Accepted Answer

PAHs contain two or more benzene rings and some are known to be carcinogenic.

Question 20

Which of the following is a correct statement about the numbering of substituents in cycloalkanes?

Accepted Answer

Numbering should give the lowest possible combination of numbers to the substituents.

Chapter 4: Introduction to Organic Compounds - GOB Chemistry Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards