Question 1

Which property is characteristic of alkanes?

Accepted Answer

Their melting points increase with increasing chain length.

Question 2

What is the IUPAC parent name for the molecule shown in image 1?

Accepted Answer

hexane

Question 3

A carbon-carbon double bond in an alkene consists of:

Accepted Answer

One sigma/hybrid bond and one pi bond

Question 4

What is the IUPAC name for the molecule shown in image 2?

Accepted Answer

2,4,5-trimethylheptane

Question 5

How many secondary carbons are present in the molecule shown in image 2?

Accepted Answer

2

Question 6

Which of the following is an isomer of the molecule shown in image 1?

Accepted Answer

CH3CH2CH2CH2CH3

Question 7

An unsaturated hydrocarbon is one that:

Accepted Answer

Has C=C double bonds.

Question 8

In image 3, what is the bond angle at the carbon indicated by the arrow?

Accepted Answer

$$109.5^{\circ}$$

Question 9

Monochlorination of pentane leads to formation of how many different halogenated products?

Accepted Answer

3

Question 10

The two molecules shown in image 4 are:

Accepted Answer

Structural isomers

Question 11

Cis-trans isomerism occurs when:

Accepted Answer

The carbons in an alkene double bond each have two different substituent groups.

Question 12

Which of the following compounds has the lowest boiling point?

Accepted Answer

cis-2-butene

Question 13

In image 6, the atoms marked 'B' are in the:

Accepted Answer

Equatorial position

Question 14

What type of reaction is shown in image 7?

Accepted Answer

Substitution

Question 15

What is the IUPAC name of the compound shown in image 8?

Accepted Answer

trans-3-chloro-2-pentene

Question 16

When an alkene undergoes a hydration reaction, the product is:

Accepted Answer

alcohol

Question 17

The stage in a polymerization reaction shown in image 5 is:

Accepted Answer

propagation

Question 18

The polymer formed from $$\mathrm{CH_2$=CH_2$} is$$:

Accepted Answer

polyethylene

Question 19

Hydrohalogenation of 3-methyl-1-butene with HCl would yield what major product?

Accepted Answer

2-chloro-3-methylbutane

Question 20

Which molecule contains a chiral carbon?

Accepted Answer

2-pentanol

CHMY 123 Midterm Practice: Organic Chemistry Concepts and Nomenclature

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