Question 1

Which of the following statements best explains why organic compounds are generally insoluble in water?

Accepted Answer

Organic compounds are nonpolar and water is polar, so they do not mix well.

Question 2

What is the molecular formula for an alkane with 7 carbon atoms?

Accepted Answer

$$\mathrm{C_7H_{16}}$$

Question 3

Which property distinguishes propane (an organic compound) from sodium chloride (an inorganic compound)?

Accepted Answer

Propane is flammable, while sodium chloride is not.

Question 4

What is the bond angle in a tetrahedral carbon atom according to VSEPR theory?

Accepted Answer

$$109.5^\circ$$

Question 5

Which of the following is the correct condensed structural formula for pentane?

Accepted Answer

CH$$_3CH$_2CH$_2CH$_2CH$_3$$

Question 6

Cycloalkanes have fewer hydrogen atoms than their open-chain counterparts. What is the molecular formula for cyclopentane?

Accepted Answer

$$\mathrm{C_5H_{10}}$$

Question 7

Which functional group is present in the molecule CH$$_3CH$_2OH$$?

Accepted Answer

Alcohol

Question 8

A molecule with the formula CH$$_3CH$_2NH$_2 is $$classified as which type of organic compound?

Accepted Answer

Amine

Question 9

Which of the following best describes the difference between an aldehyde and a ketone?

Accepted Answer

An aldehyde has a carbonyl group attached to a hydrogen, while a ketone has a carbonyl group attached to two carbon atoms.

Question 10

Which of the following is a real-world application of esters?

Accepted Answer

Esters are responsible for the aroma and flavor of many fruits such as bananas and strawberries.

Question 11

What is the balanced equation for the complete combustion of butane ($$\mathrm{C_4H_{10}}$$)?

Accepted Answer

$$\mathrm{2C_4H_{10} + 13O_2 \rightarrow 8CO_2 + 10H_2O}$$

Question 12

Which of the following molecules is chiral?

Accepted Answer

A carbon atom bonded to four different groups.

Question 13

Which functional group is present in acetone?

Accepted Answer

Ketone

Question 14

What is the main difference between saturated and unsaturated hydrocarbons?

Accepted Answer

Saturated hydrocarbons have only single bonds, while unsaturated hydrocarbons have double or triple bonds.

Question 15

Which of the following is a property of amine salts that makes them useful in pharmaceuticals?

Accepted Answer

They are soluble in water and body fluids.

Question 16

Which of the following best describes the structure of benzene?

Accepted Answer

A ring of six carbon atoms with alternating double and single bonds.

Question 17

Which functional group is responsible for the strong odor in onions and garlic?

Accepted Answer

Thiols ($$-SH$$ group)

Question 18

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

Accepted Answer

Alcohols have higher boiling points due to hydrogen bonding.

Question 19

Which compound is used as a topical anesthetic and is an aromatic alcohol?

Accepted Answer

Phenol

Introduction to Organic Chemistry and Functional Groups

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