Question 1

Which of the following amino acids is acidic?

Accepted Answer

A) alanine 
B) aspartic 
C) glycine 
D) valine 
A) alanine 
B) aspartic 
C) glycine 
D) valine

Question 2

What is the hybridization of the carbon in (CH3)2C=CHCN indicated by the asterisk (*)?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) dsp3 
A) sp 
B) sp2 
C) sp3 
D) dsp3

Question 3

-Which of these molecules above have a partial positive charge (δ+)on the carbon atom?

Accepted Answer

A) only (1) 
B) only (3) 
C) (1)and (3) 
D) (2)and (4) 
A) only (1) 
B) only (3) 
C) (1)and (3) 
D) (2)and (4)

Question 4

Name the product of hydrogenation of trans-2-pentene.

Accepted Answer

A) pentane 
B) cis-2-pentene 
C) trans-2-pentane 
D) none of these 
A) pentane 
B) cis-2-pentene 
C) trans-2-pentane 
D) none of these

Question 5

Do the two condensed structures (1)and (2)below represent the same or different molecules?
CH3 CH3 CH3
| | |
CH3CHCH2CHCH3 CH3CHCH2CHCH3
|
CH3
(1)(2)

Accepted Answer

Condensed structures

Question 6

Which of the following is trans-2-butene? (Only bonds are shown in the skeletal structures below;the carbon and hydrogen atoms are deleted. )

Accepted Answer

A) structure a 
B) structure b 
C) structure c 
D) none of these 
A) structure a 
B) structure b 
C) structure c 
D) none of these

Question 7

Identify the functional group:

Accepted Answer

A) aldehyde 
B) ketone 
C) ester 
D) ether 
A) aldehyde 
B) ketone 
C) ester 
D) ether

Question 8

Which compound is a saturated hydrocarbon?

Accepted Answer

A) benzene 
B) cyclohexene 
C) 2-methylpentane 
D) propylene 
A) benzene 
B) cyclohexene 
C) 2-methylpentane 
D) propylene

Question 9

In the protein,Val-Tyr-His-Pro,which amino acid contains the N-terminal group?

Accepted Answer

A) histidine 
B) proline 
C) tyrosine 
D) valine 
A) histidine 
B) proline 
C) tyrosine 
D) valine

Question 10

Identify the amino acid shown below.

Accepted Answer

A) Cysteine (Cys) 
B) Serine (Ser) 
C) Threonine (Thr) 
D) Tyrosine (Tyr) 
A) Cysteine (Cys) 
B) Serine (Ser) 
C) Threonine (Thr) 
D) Tyrosine (Tyr)

Question 11

How many isomers exist for C5H12? Of these isomers,how many are straight-chain isomers and how many are branched isomers?

Accepted Answer

Question 12

(CH3)3C- represents a ________ (normal,secondary,tertiary)butyl group.

Accepted Answer

Question 13

What functional group is commonly found in fats?

Accepted Answer

A) -NH2 
B) -OH 
C) -C-O-C 
D)   
A) -NH2 
B) -OH 
C) -C-O-C 
D)

Question 14

Which one of the following amino acids contains a polar side chain?

Accepted Answer

A) alanine 
B) glycine 
C) threonine 
D) valine 
A) alanine 
B) glycine 
C) threonine 
D) valine

Question 15

Which of the following condensed structures represent the same molecule?

Accepted Answer

A) I and II 
B) II and IV 
C) III and IV 
D) II and III 
A) I and II 
B) II and IV 
C) III and IV 
D) II and III

Question 16

Which of the following statements about properties of organic compounds is not correct?

Accepted Answer

A) Most organic compounds are not soluble in water. 
B) Most organic compounds do not conduct electricity. 
C) Organic compounds have higher melting and boiling points than ionic compounds. 
D) Organic compounds have weak intermolecular forces. 
A) Most organic compounds are not soluble in water. 
B) Most organic compounds do not conduct electricity. 
C) Organic compounds have higher melting and boiling points than ionic compounds. 
D) Organic compounds have weak intermolecular forces.

Question 17

C2H6O is the empirical formula for both ethyl alcohol,CH3CH2OH and dimethyl ether,CH3OCH3.In order to boil CH3CH2OH the strongest intermolecular forces that must be overcome are (London dispersion,dipole-dipole,hydrogen bonding)forces.In order to boil CH3OCH3 the strongest intermolecular forces that must be overcome are (London dispersion,dipole-dipole,hydrogen bonding)forces.Which compound is expected to have the higher boiling point?

Accepted Answer

hydrogen b

Question 18

Which of the structures below are identical?

Accepted Answer

A) I and II 
B) II and III 
C) III and IV 
D) I and IV 
A) I and II 
B) II and III 
C) III and IV 
D) I and IV

Question 19

Organic molecules containing only carbon and hydrogen and having only single bonds are called ________ hydrocarbons,or ________.

Accepted Answer

The answer of Organic molecules containing only carbon and hydrogen...

Question 20

Which structure is para-dibromobenzene?

Accepted Answer

A) structure I 
B) structure II 
C) structure III 
D) structure IV 
A) structure I 
B) structure II 
C) structure III 
D) structure IV

Exam 23: Organic and Biological Chemistry

Which of the following amino acids is acidic?

What is the hybridization of the carbon in (CH3)2C=CHCN indicated by the asterisk (*)?

-Which of these molecules above have a partial positive charge (δ+)on the carbon atom?

Name the product of hydrogenation of trans-2-pentene.

Do the two condensed structures (1)and (2)below represent the same or different molecules? CH3 CH3 CH3 | | | CH3CHCH2CHCH3 CH3CHCH2CHCH3 | CH3 (1)(2)

Which of the following is trans-2-butene? (Only bonds are shown in the skeletal structures below;the carbon and hydrogen atoms are deleted. )

Identify the functional group:

Which compound is a saturated hydrocarbon?

In the protein,Val-Tyr-His-Pro,which amino acid contains the N-terminal group?

Identify the amino acid shown below.

How many isomers exist for C5H12? Of these isomers,how many are straight-chain isomers and how many are branched isomers?

(CH3)3C- represents a ________ (normal,secondary,tertiary)butyl group.

What functional group is commonly found in fats?

Which one of the following amino acids contains a polar side chain?

Which of the following condensed structures represent the same molecule?

Which of the following statements about properties of organic compounds is not correct?

Which of the structures below are identical?

Organic molecules containing only carbon and hydrogen and having only single bonds are called ________ hydrocarbons,or ________.

Which structure is para-dibromobenzene?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Filters

What is the hybridization of the carbon in (CH₃)₂C=CHCN indicated by the asterisk (*)?

Do the two condensed structures (1)and (2)below represent the same or different molecules? CH₃ CH₃ CH₃ | | | CH₃CHCH₂CHCH₃ CH₃CHCH₂CHCH₃ | CH₃ (1)(2)

How many isomers exist for C₅H₁₂? Of these isomers,how many are straight-chain isomers and how many are branched isomers?

(CH₃)₃C- represents a ________ (normal,secondary,tertiary)butyl group.

Organic molecules containing only carbon and hydrogen and having only single bonds are called hydrocarbons,or .