Question 1

Which of the following statements correctly describes how an alkyl group is formed from an alkane?

Accepted Answer

By removing a hydrogen atom from an alkane molecule.

Question 2

What is the correct IUPAC name for the alkyl group formed by removing a hydrogen from the second carbon of pentane?

Accepted Answer

Pent-2-yl

Question 3

Given the structure below, what is the name of the alkyl group with the formula $$\mathrm{C_3H_7}$$ that is attached to the end of a carbon chain?

Accepted Answer

Propyl

Question 4

Which prefix is used for an alkyl group containing four carbon atoms?

Accepted Answer

But-

Question 5

A tertiary carbon is defined as a carbon atom attached to how many other carbon atoms?

Accepted Answer

$$3$$

Question 6

Which of the following alkyl groups is a structural isomer of butyl?

Accepted Answer

Isobutyl

Question 7

If you remove a hydrogen atom from the middle carbon of propane, what alkyl group is formed?

Accepted Answer

Isopropyl

Question 8

Which of the following is the correct formula for the hexyl group?

Accepted Answer

$$\mathrm{C_6H_{13}}$$

Question 9

A secondary carbon is attached to how many other carbon atoms?

Accepted Answer

$$2$$

Question 10

Which of the following alkyl groups is attached to a tertiary carbon in its parent structure?

Accepted Answer

Tert-butyl

Question 11

What is the correct name for the alkyl group $$\mathrm{CH_3CH_2CH_2-}$$?

Accepted Answer

Propyl

Question 12

Which of the following is NOT a structural isomer of butyl?

Accepted Answer

Propyl

Question 13

A patient is given a medication with a hexyl group attached to its structure. How many carbon atoms are present in the hexyl group?

Accepted Answer

$$6$$

Question 14

Which alkyl group would result from removing a hydrogen atom from the end carbon of butane?

Accepted Answer

Butyl

Question 15

Which of the following correctly matches the number of carbons to the alkyl prefix?

Accepted Answer

4 carbons: but-

Question 16

A compound contains both methyl and ethyl groups. What is the total number of carbon atoms in these two groups combined?

Accepted Answer

$$4$$

Question 17

Which of the following alkyl groups is most likely to be found attached to a secondary carbon in a branched alkane?

Accepted Answer

Sec-butyl

Question 18

If a molecule contains an isopropyl group, how many carbon atoms are present in that group?

Accepted Answer

$$3$$

Question 19

Which of the following is the correct structural formula for tert-butyl group?

Accepted Answer

$$\mathrm{(CH_3$)_3C-}$$

Question 20

A chemist is analyzing a compound and finds an alkyl group attached to a tertiary carbon. Which group is most likely present?

Accepted Answer

Tert-butyl

Alkyl Groups: Structure, Naming, and Classification in Organic Chemistry

Study Guide - Practice Questions