Question 1

Which of the following statements about geometric isomers in alkenes is correct?

Accepted Answer

Geometric isomers are possible when there are two different groups attached to each carbon of the double bond.

Question 2

What is the correct systematic name for the following alkene structure?

(CH$_3$)-CH$_2$-CH=CH-CH$_2$-CH$_3$

Accepted Answer

$3$-methyl-$2$-hexene

Question 3

Which rule is used to determine the parent chain when naming alkenes?

Accepted Answer

Choose the longest chain containing the double bond.

Question 4

Why is cis-trans isomerism not possible in cycloalkenes with only three carbon atoms?

Accepted Answer

Because the ring is too small to allow for different spatial arrangements around the double bond.

Question 5

Given the name 'cis-5-methyl-2-hexene', which of the following is the correct structure?

Accepted Answer

A six-carbon chain with a double bond between C2 and C3, a methyl group on C5, and the two largest groups on the same side of the double bond.

Question 6

What is the correct IUPAC name for the following structure?

(CH$_3$)-CH$_2$-CH$_2$-CH=CH-CH$_2$-CH$_3$

Accepted Answer

$2$-heptene

Question 7

When naming an alkene, what is the correct way to number the carbon chain?

Accepted Answer

Number from the end closest to the double bond.

Question 8

Which of the following is true about the location designation in alkene nomenclature?

Accepted Answer

The location number refers to the position of the double bond in the parent chain.

Question 9

Which of the following is the correct structure for 3-isopropylcyclohexene?

Accepted Answer

A cyclohexene ring with a double bond and an isopropyl group attached to carbon 3.

Question 10

Which of the following is NOT a correct step in the systematic naming of alkenes?

Accepted Answer

Assign substituents to the chain before numbering the carbons.

Question 11

Which of the following best describes the difference between cis and trans isomers in alkenes?

Accepted Answer

Cis isomers have substituents on the same side of the double bond, while trans isomers have them on opposite sides.

Question 12

If an alkene has the parent chain 'hexene' and a methyl group at carbon 4, with the double bond between carbons 2 and 3, what is the correct name?

Accepted Answer

$4$-methyl-$2$-hexene

Question 13

Which of the following is a correct application of the parent-modifier-prefix system in alkene nomenclature?

Accepted Answer

The parent chain is the longest chain containing the double bond, the modifier indicates cis/trans, and the prefix lists substituents.

Question 14

Which of the following is the correct systematic name for the alkene with the structure:

CH$_2$=CH-CH$_2$-CH$_2$-CH$_3$

Accepted Answer

$1$-pentene

Question 15

A student draws the structure for trans-2-butene. Which of the following features must be present?

Accepted Answer

The two methyl groups are on opposite sides of the double bond.

Question 16

Which of the following is true regarding the use of location numbers in cyclic alkenes?

Accepted Answer

Location numbers are not necessary if the double bond is in position 1 of a ring.

Question 17

Which of the following is the correct name for an alkene with a six-carbon ring and a double bond, with a methyl group attached to carbon 1?

Accepted Answer

1-methylcyclohexene

Question 18

Which of the following is a correct statement about the double bond in alkenes?

Accepted Answer

A double bond consists of one sigma ($\sigma$) and one pi ($\pi$) bond.

Question 19

Which of the following is the correct systematic name for the alkene with the structure:

CH$_3$-CH$_2$-CH=CH-CH$_2$-CH$_3$

Accepted Answer

$2$-hexene

Alkene Nomenclature and Geometric Isomerism

Study Guide - Practice Questions