Mastering Organic Chemistry: Functional Groups Quiz

1. What is the chemical formula for Ether?

NaCl

CO2

Formula: ROR

H2O

Ether's chemical formula is ROR, which represents its structure of two alkyl (or aryl) groups connected by an oxygen atom in the middle.

Explanation

Ether's chemical formula is ROR, which represents its structure of two alkyl (or aryl) groups connected by an oxygen atom in the middle.

2. Which chemical formula represents an aromatic compound?

Formula: CH4

Formula: NaCl

Formula: ArH

Formula: H2O

The correct formula for an aromatic compound is ArH, where Ar represents an aromatic ring.

Explanation

The correct formula for an aromatic compound is ArH, where Ar represents an aromatic ring.

3. What is the chemical formula for an ester?

Formula: CO2

Formula: RCOOR'

Formula: H2O

Formula: NaCl

An ester is a chemical compound derived from an acid (organic or inorganic) in which at least one -OH (hydroxyl) group is replaced by an -O-alkyl group. The general formula for an ester is RCOOR', where R and R' are alkyl or aryl groups.

Explanation

An ester is a chemical compound derived from an acid (organic or inorganic) in which at least one -OH (hydroxyl) group is replaced by an -O-alkyl group. The general formula for an ester is RCOOR', where R and R' are alkyl or aryl groups.

4. What is the general formula for an alkene?

NH3

Formula:R2C=CR2 C=Cpka=44

CH4

H2O

An alkene is characterized by having a carbon-carbon double bond, which is represented by the general formula R2C=CR2 or simply C=C.

Explanation

An alkene is characterized by having a carbon-carbon double bond, which is represented by the general formula R2C=CR2 or simply C=C.

5. What is the chemical formula for alcohol?

Formula: ROHpka= 15-18

H2O

NH3

CO2

Alcohol is represented by the general formula ROH, where R can be any alkyl group. This formula distinguishes alcohols from other chemical compounds such as water (H2O), carbon dioxide (CO2), and ammonia (NH3).

Explanation

Alcohol is represented by the general formula ROH, where R can be any alkyl group. This formula distinguishes alcohols from other chemical compounds such as water (H2O), carbon dioxide (CO2), and ammonia (NH3).

6. What is the formula for a haloalkane?

CH4

H2O

CO2

Formula: RX

Haloalkanes are organic compounds that contain a carbon-halogen bond. The correct formula for a haloalkane is generally represented as RX, where R is an alkyl group and X is a halogen atom.

Explanation

Haloalkanes are organic compounds that contain a carbon-halogen bond. The correct formula for a haloalkane is generally represented as RX, where R is an alkyl group and X is a halogen atom.

7. What is the formula of a carboxylic acid and its pka value?

Formula: RCOOHpka= 5

Pka = 3

Formula: RCHO

Formula: RSO3H

8. What is the formula for a nitrile?

CH4CN

CNH

CH3CN

Formula: RCN

A nitrile is a chemical compound that contains a cyano functional group (-CN). The general formula for a nitrile is RCN, where R represents an alkyl or aryl group.

Explanation

A nitrile is a chemical compound that contains a cyano functional group (-CN). The general formula for a nitrile is RCN, where R represents an alkyl or aryl group.

9. What is the chemical formula for an alkyne?

Formula: RCH2. CH2

Formula: R-NH2. NH2

Formula: RC?CR' C?Cpka=25

Formula: RCO. CO

Alkynes are hydrocarbons that contain a carbon-carbon triple bond. The general formula for alkynes is RC?CR' or C?C.

Explanation

Alkynes are hydrocarbons that contain a carbon-carbon triple bond. The general formula for alkynes is RC?CR' or C?C.

10. What is the chemical formula for an aldehyde?

Formula: RHCO

Formula: RCH2O

Formula: RCHO

Formula: ROHC

Aldehydes have the general formula RCHO, where R represents an alkyl or aryl group.

Explanation

Aldehydes have the general formula RCHO, where R represents an alkyl or aryl group.

11. What is the formula for an amide?

Formula: RCN

Formula: RCONR2

Formula: ROH

Formula: RCOOH

Amides are compounds containing a carbonyl group bonded to a nitrogen atom with the general formula RCONR2, where R can be a hydrogen atom or an organic group.

Explanation

Amides are compounds containing a carbonyl group bonded to a nitrogen atom with the general formula RCONR2, where R can be a hydrogen atom or an organic group.

12. What is the formula for a ketone?

Formula: CH3OH

Formula: RCHO

Formula: COOH

Formula: RCOR'

A ketone is a compound with the functional group RCOR', where R and R' can be alkyl or aryl groups. It is different from an aldehyde (RCHO), a carboxylic acid (COOH), or a methyl alcohol (CH3OH).

Explanation

A ketone is a compound with the functional group RCOR', where R and R' can be alkyl or aryl groups. It is different from an aldehyde (RCHO), a carboxylic acid (COOH), or a methyl alcohol (CH3OH).

13. What is the general formula for amines?

Formula: ROH (Primary), R2OH(secondary), R3O(tertiary)

Formula: RNH2 (Primary), R2NH(secondary), R3N(tertiary) primary--->

Formula: RCNH2 (Primary), R2CNNH(secondary), R3CN(tertiary)

Formula: RCOOH (Primary), R2COOH(secondary), R3COO(tertiary)

The general formula for amines consists of an amino group (NH2) attached to a carbon chain. The number of carbon chains attached to the nitrogen atom determines whether it is a primary, secondary, or tertiary amine.

Explanation

The general formula for amines consists of an amino group (NH2) attached to a carbon chain. The number of carbon chains attached to the nitrogen atom determines whether it is a primary, secondary, or tertiary amine.

14. What is the general formula for an alkane?

Formula: RH C-Cpka=50

Formula: R-CHOH-CHOH-R C-O

Alkanes are hydrocarbons with single covalent bonds between carbon atoms, thus the general formula is RH with a straight carbon chain structure.

Explanation

Alkanes are hydrocarbons with single covalent bonds between carbon atoms, thus the general formula is RH with a straight carbon chain structure.