40 challenging multiple-choice questions at the university undergraduate level covering various organic chemistry functional groups, along with detailed solutions

**Question 1: Functional Groups**

Which functional group is present in CH₃-CH₂-C≡N?

a) Alcohol

b) Alkene

c) Alkyne

d) Nitrile

**Solution:**

c) Alkyne

**Question 2: Functional Groups**

What functional group is found in both aldehydes and ketones?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Alkyne

**Solution:**

b) Carbonyl

**Question 3: Functional Groups**

Which functional group is present in CH₃-CH₂-CHO?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

c) Aldehyde

**Question 4: Functional Groups**

What is the functional group in CH₃-CH₂-COOH?

a) Alcohol

b) Carboxylic acid

c) Aldehyde

d) Ketone

**Solution:**

b) Carboxylic acid

**Question 5: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-OH?

a) Alkene

b) Alcohol

c) Aldehyde

d) Ketone

**Solution:**

b) Alcohol

**Question 6: Functional Groups**

What is the functional group in CH₃-CH₂-CH₂-CHO?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

c) Aldehyde

**Question 7: Functional Groups**

Which functional group is present in CH₃-C≡N?

a) Alcohol

b) Alkene

c) Alkyne

d) Nitrile

**Solution:**

d) Nitrile

**Question 8: Functional Groups**

What functional group is found in both carboxylic acids and esters?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Carboxyl

**Solution:**

d) Carboxyl

**Question 9: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-COOCH₃?

a) Alcohol

b) Ester

c) Aldehyde

d) Ketone

**Solution:**

b) Ester

**Question 10: Functional Groups**

What is the functional group in CH₃-CH₂-COOCH₂CH₃?

a) Alcohol

b) Carboxylic acid

c) Alkene

d) Ester

**Solution:**

d) Ester

**Question 11: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-CH₂-NH₂?

a) Alcohol

b) Amine

c) Aldehyde

d) Ketone

**Solution:**

b) Amine

**Question 12: Functional Groups**

What functional group is found in both alcohols and phenols?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Aldehyde

**Solution:**

a) Hydroxyl

**Question 13: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-SH?

a) Alcohol

b) Thiol

c) Aldehyde

d) Ketone

**Solution:**

b) Thiol

**Question 14: Functional Groups**

What is the functional group in CH₃-CH₂-CH₂-CH₂-CHO?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

c) Aldehyde

**Question 15: Functional Groups**

Which functional group is present in CH₃-CH₂-COOCH₃?

a) Alcohol

b) Ester

c) Aldehyde

d) Ketone

**Solution:**

b) Ester

**Question 16: Functional Groups**

What functional group is found in both ethers and esters?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Ether

**Solution:**

d) Ether

**Question 17: Functional Groups**

Which functional group is present in CH₃-CH₂-COCH₃?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

d) Ketone

**Question 18: Functional Groups**

What is the functional group in CH₃-CH₂-CH₂-CH₂-C≡CH?

a) Alcohol

b) Alkene

c) Aldehyde

d) Alkyne

**Solution:**

d) Alkyne

**Question 19: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-CH₂-N(CH₃)₂?

a) Alcohol

b) Amine

c) Aldehyde

d) Ketone

**Solution:**

b) Amine

**Question 20: Functional Groups**

What functional group is found in both carboxylic acids and amides?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Amide

**Solution:**

d) Amide

**Question 21: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-COCH₃?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

d) Ketone

**Question 22: Functional Groups**

What is the functional group in CH₃-CH₂-SH?

a) Alcohol

b) Thiol

c) Aldehyde

d) Ketone

**Solution:**

b) Thiol

**Question 23: Functional Groups**

Which functional group is present in CH₃-CH₂-O-CH₃?

a) Alcohol

b) Ester

c) Aldehyde

d) Ether

**Solution:**

d) Ether

**Question 24: Functional Groups**

What functional group is found

 in both alcohols and amines?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Amine

**Solution:**

a) Hydroxyl

**Question 25: Functional Groups**

Which functional group is present in CH₃-CH₂-CHO?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

c) Aldehyde

**Question 26: Functional Groups**

What is the functional group in CH₃-CH₂-CH₂-C≡N?

a) Alcohol

b) Alkene

c) Alkyne

d) Nitrile

**Solution:**

c) Alkyne

**Question 27: Functional Groups**

Which functional group is present in CH₃-COOH?

a) Alcohol

b) Carboxylic acid

c) Aldehyde

d) Ketone

**Solution:**

b) Carboxylic acid

**Question 28: Functional Groups**

What functional group is found in both ketones and esters?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Ester

**Solution:**

b) Carbonyl

**Question 29: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-OH?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

a) Alcohol

**Question 30: Functional Groups**

What is the functional group in CH₃-CH₂-CH₂-CHO?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

c) Aldehyde

**Question 31: Functional Groups**

Which functional group is present in CH₃-C≡N?

a) Alcohol

b) Alkene

c) Alkyne

d) Nitrile

**Solution:**

d) Nitrile

**Question 32: Functional Groups**

What functional group is found in both carboxylic acids and amides?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Amide

**Solution:**

d) Amide

**Question 33: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-SH?

a) Alcohol

b) Thiol

c) Aldehyde

d) Ketone

**Solution:**

b) Thiol

**Question 34: Functional Groups**

What is the functional group in CH₃-CH₂-CH₂-COOCH₃?

a) Alcohol

b) Ester

c) Aldehyde

d) Ketone

**Solution:**

b) Ester

**Question 35: Functional Groups**

Which functional group is present in CH₃-CH₂-COCH₃?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

d) Ketone

**Question 36: Functional Groups**

What functional group is found in both alcohols and phenols?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Aldehyde

**Solution:**

a) Hydroxyl

**Question 37: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-CH₂-CHO?

a) Alcohol

b) Alkene

c) Aldehyde

d) Ketone

**Solution:**

c) Aldehyde

**Question 38: Functional Groups**

What is the functional group in CH₃-CH₂-COOCH₂CH₃?

a) Alcohol

b) Carboxylic acid

c) Alkene

d) Ester

**Solution:**

d) Ester

**Question 39: Functional Groups**

Which functional group is present in CH₃-CH₂-CH₂-CH₂-NH₂?

a) Alcohol

b) Amine

c) Aldehyde

d) Ketone

**Solution:**

b) Amine

**Question 40: Functional Groups**

What functional group is found in both ethers and esters?

a) Hydroxyl

b) Carbonyl

c) Alkene

d) Ether

**Solution:**

d) Ether

These challenging multiple-choice questions cover various organic chemistry functional groups, and the detailed solutions provide explanations to help you understand the correct answers.