$\\mathrm{C}_n\\mathrm{H}_{2n+2}$

$\\mathrm{CH_3CH(CH_3)CH_2CH_3}$

Tetrahedral, bond angles of $109.5^\\circ$

Question 1

Which of the following statements best describes an alkane?

Accepted Answer

A hydrocarbon containing only single bonds between carbon atoms.

Question 2

What is the general molecular formula for alkanes?

Accepted Answer

$\mathrm{C}_n\mathrm{H}_{2n+2}$

Question 3

Which of the following is the correct IUPAC name for the compound $\mathrm{CH_3CH_2CH_2CH_3}$?

Accepted Answer

Butane

Question 4

Which conformation of butane is the most stable due to minimized torsional strain?

Accepted Answer

Staggered anti conformation

Question 5

Cyclohexane adopts a chair conformation to:

Accepted Answer

Reduce steric and torsional strain

Question 6

Which of the following is a property of alkanes?

Accepted Answer

They are generally nonpolar and insoluble in water.

Question 7

What is the IUPAC name for the following compound: $\mathrm{CH_3CH_2CH_2CH_2CH_3}$?

Accepted Answer

Pentane

Question 8

Which of the following best describes the bonding in ethene ($\mathrm{C_2H_4}$)?

Accepted Answer

Each carbon forms three sigma bonds and one pi bond.

Question 9

Which of the following is a correct statement about the boiling points of alkanes?

Accepted Answer

Boiling point increases with increasing molecular mass.

Question 10

Which of the following is the correct condensed structural formula for 2-methylpropane?

Accepted Answer

$\mathrm{CH_3CH(CH_3)CH_3}$

Question 11

Which of the following is a constitutional isomer of pentane?

Accepted Answer

$\mathrm{CH_3CH(CH_3)CH_2CH_3}$

Question 12

Which of the following best describes the geometry around each carbon atom in an alkane?

Accepted Answer

Tetrahedral, bond angles of $109.5^\circ$

Question 13

Which of the following is the correct IUPAC name for the compound with the structure $\mathrm{CH_3CH_2C\equiv CCH_3}$?

Accepted Answer

2-pentyne

Question 14

Which of the following statements about cycloalkanes is correct?

Accepted Answer

Cycloalkanes have two fewer hydrogens than their corresponding alkanes.

Question 15

Which of the following is a correct statement about the E/Z system for alkenes?

Accepted Answer

Z isomers have higher priority groups on the same side of the double bond.

Question 16

Which of the following best explains why cyclohexane adopts a chair conformation?

Accepted Answer

To minimize angle and torsional strain.

Question 17

Which of the following is the correct IUPAC name for the compound $\mathrm{CH_2=CHCH_2CH_3}$?

Accepted Answer

1-butene

Question 18

Which of the following is a property of alkenes that distinguishes them from alkanes?

Accepted Answer

Alkenes can undergo addition reactions.

Question 19

Which of the following best describes the bonding in ethyne ($\mathrm{C_2H_2}$)?

Accepted Answer

Each carbon forms two sigma bonds and two pi bonds.

Study Notes: Introduction to Hydrocarbons, Alkanes, Alkenes, and Alkynes

Study Guide - Practice Questions