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Organic Chemistry MCQ

Organic Chemistry

1. All chemical activities can be viewed as a series of ____________ between molecules.

Chemical reactions

Chemical reproduction

Chemical bonding

None of these

Answer

Correct Answer: Chemical reactions

Note: This Question is unanswered, help us to find answer for this one

2. Geometric isomers are molecules that _____.

Are isomers in which one of the molecules contains an amino group and the other contains a phosphate group

Differ in their molecular formulas

Differ in the arrangement of their atoms about a double bond

Are isomers that differ in the covalent partnerships between their atoms

Are mirror images

Answer

Correct Answer: Differ in the arrangement of their atoms about a double bond

Note: This Question is unanswered, help us to find answer for this one

3. Chemical groups are significant because __________.

They contribute to the molecular shape of a molecule and its unique properties

Abiotic compounds cycled through the apparatus and were sampled for organic compounds

The same molecular formula but different covalent arrangements of heir carbon skeletons

A carbon atom can complete its valence shell by forming four covalent bonds

Answer

Correct Answer: They contribute to the molecular shape of a molecule and its unique properties

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4. Biologically important chemical groups include all of the following except __________.

Acid, amino

Called hydrocarbons

Lack of H atoms

Water (H2O)

Answer

Correct Answer: Water (H2O)

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5. The chemical group that is involved in regulating dna is the __________.

Water (H2O)

Methyl group (-CH3)

Carbon

COOH and -NH2

Answer

Correct Answer: Methyl group (-CH3)

Note: This Question is unanswered, help us to find answer for this one

6. Stanley miller's 1953 experiments supported the hypothesis that _____.

Can form a variety of carbon skeletons and host functional groups

Organic molecules can be synthesized abiotically under conditions that may have existed on early Earth

Simple organic compounds, amino acids, and hydrocarbons

The presence or absence of double bonds between the carbon atom and other atoms

Answer

Correct Answer: Organic molecules can be synthesized abiotically under conditions that may have existed on early Earth

Note: This Question is unanswered, help us to find answer for this one

7. Organic molecules with only hydrogens and five carbon atoms cannot _____.

Form enantiomers.

Carboxyl and amino groups

Carboxyl

Hydroxyl

Answer

Correct Answer: Form enantiomers.

Note: This Question is unanswered, help us to find answer for this one

8. The functional groups shown are the ___ group, the _ group, and the _____ group.

Amino

Carboxyl

Carboxyl and amino groups

Carbon

Answer

Correct Answer: Carboxyl

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9. The most important way to classify organic compounds is by _____.

The number of carbon atoms in the longest chain

Functional group

The type of carbon—carbon bonds

Reactivity

Answer

Correct Answer: Functional group

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10. The complexity and variety of organic molecules is due to _____.

The chemical versatility of carbon atoms

The variety of rare elements in organic molecules

The diverse bonding patterns of nitrogen

Their interaction with water

Answer

Correct Answer: The chemical versatility of carbon atoms

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11. The carbon atom is tetravalent, which means that __________.

Carbon readily forms ionic bonds

Carbon's first electron shell holds 4 electrons

A carbon atom can complete its valence shell by forming four covalent bonds

The bond angle between each bond is 90°, forming an arrangement like the points on a compass

Carbon has a total of 4 electrons

Answer

Correct Answer: A carbon atom can complete its valence shell by forming four covalent bonds

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12. The delocalized system in benzene is formed by a cyclic overlap of 6 ________ orbitals.

Sp2

Sp3

Answer

Correct Answer: P

Note: This Question is unanswered, help us to find answer for this one

13. An atom with z = 26 and a = 58 contains protons and neutrons.

26; 58.

58; 26.

26; 32.

32; 26.

Answer

Correct Answer: 26; 32.

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14. Typically, amides will hydrolyze under ________ conditions than esters.

Less vigorous

More dilute

More saline

Stronger

Answer

Correct Answer: Stronger

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15. Choline is a quaternary ammonium compound with a __________ charge on the nitrogen.

Positive

Negative

Zero

Neutral

Answer

Correct Answer: Positive

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16. In an ethane (c2h6) molecule, each carbon atom is bonded to ________ hydrogen atoms.

Three

Two

Four

Five

Answer

Correct Answer: Three

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17. The carbon skeleton can vary in all of the following except __________.

Lack of H atoms

Orbital

Bohr orbit

Atomic Orbit

Answer

Correct Answer: Lack of H atoms

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18. The chemical group that helps stabilize protein structure is the __________.

Sulfhydryl group (-SH)

Take place in nuclear reactors

Are always fusion reactions

Never produce radioactive by-products

Answer

Correct Answer: Sulfhydryl group (-SH)

Note: This Question is unanswered, help us to find answer for this one

19. A cycloalkane ________.

Has two fewer carbon atoms than the corresponding alkane

Has two fewer hydrogen atoms than the corresponding alkane

Contains - CH3 groups joined by single bonds

Always contains a three carbon ring

Answer

Correct Answer: Has two fewer hydrogen atoms than the corresponding alkane

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20. The carbon-carbon triple bond of an alkyne is composed of ________.

Three σ bonds

Three π bonds

Two σ bonds and one π bond

One σ bond and two π bonds

Answer

Correct Answer: One σ bond and two π bonds

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21. A mole of yellow photons of wavelength 527 nm has ________ kj of energy.

227

123

223

226

Answer

Correct Answer: 227

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22. The ionized or dissociated carboxyl group may be written as __________.

-O -

-COO -

-NH4 -

-C=O

Answer

Correct Answer: -COO -

Note: This Question is unanswered, help us to find answer for this one

23. 1-methylcyclopentanol is classified as ________.

A primary alcohol

A secondary alcohol

A tertiary alcohol

A phenol

An enol

Answer

Correct Answer: A tertiary alcohol

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24. A gas under constant pressure will when .

Contract; heated

Expand; cooled

Expand; heated

Keep the same volume when heated or cooled

Answer

Correct Answer: Expand; heated

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25. Stanley miller's experiments were significant because he demonstrated that __________.

The behavior of any molecule containing a carbon atom was fundamentally the same

Under certain circumstances the theory of vitalism was valid

A large variety of organic compounds could be spontaneously synthesized from components in Earth's primitive atmosphere

Lightning discharges could produce the molecules previously presumed to have originated in volcanic outgassings

Urea could be synthesized from entirely naturally occurring salts

Answer

Correct Answer: A large variety of organic compounds could be spontaneously synthesized from components in Earth's primitive atmosphere

Note: This Question is unanswered, help us to find answer for this one

26. Of the bonds below, ________ is the least polar.

C–C

C–N

C–Cl

C–F

C–O

Answer

Correct Answer: C–C

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27. Enantiomers are molecules that _____.

Contain an -OH group

Are mirror images

Differ in the arrangement of their molecules about a double bond

Contain a carboxyl group

Are isomers that differ in the covalent partnerships between their atoms

Answer

Correct Answer: Are mirror images

Note: This Question is unanswered, help us to find answer for this one

28. Enantiomers are __________.

Mirror-image isomers of a molecule

Hydrophobic, non polar, and good source of stored energy

Cis - trans isomers

May not be equally effective

Answer

Correct Answer: Mirror-image isomers of a molecule

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29. Dopamine,c8h11no2, has ____________ degrees of unsaturation.

Answer

Correct Answer: 4

Note: This Question is unanswered, help us to find answer for this one

30. A secondary alcohol has a hydroxyl group bonded to a(n) ________.

Ketones

Carbon bonded to three alkyl groups

Skunky or bad smelling odors

Carbon bonded to two alkyl groups

Answer

Correct Answer: Carbon bonded to two alkyl groups

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31. A saturated hydrocarbon is an organic compound which contains hydrogen and carbon joined _____.

The boiling points

With single bonds

A double bond between carbon atoms

Octane

Answer

Correct Answer: With single bonds

Note: This Question is unanswered, help us to find answer for this one

32. A carbon atom with four single bonds will be ____________hybridized.

Sp2

Lone pair

Sp3

Answer

Correct Answer: Sp3

Note: This Question is unanswered, help us to find answer for this one

Chemistry MCQs | Topic-wise

MCQ on Acid/Base Study	MCQ on Atmospheric Chemistry
MCQ on Atomic Structure And Chemical Bonding	MCQ on Biological Chemistry
MCQ on Chemical Reactions	MCQ on General Chemistry
MCQ on Inorganic Chemistry	MCQ on Nuclear Chemistry
MCQ on Organic Chemistry	MCQ on Physical Chemistry
General Chemistry MCQs

Organic Chemistry MCQ

1. All chemical activities can be viewed as a series of ____________ between molecules.

2. Geometric isomers are molecules that _____.

3. Chemical groups are significant because __________.

4. Biologically important chemical groups include all of the following except __________.

5. The chemical group that is involved in regulating dna is the __________.

6. Stanley miller's 1953 experiments supported the hypothesis that _____.

7. Organic molecules with only hydrogens and five carbon atoms cannot _____.

8. The functional groups shown are the _______ group, the _______ group, and the _______ group.

9. The most important way to classify organic compounds is by _____.

10. The complexity and variety of organic molecules is due to _____.

11. The carbon atom is tetravalent, which means that __________.

12. The delocalized system in benzene is formed by a cyclic overlap of 6 ________ orbitals.

13. An atom with z = 26 and a = 58 contains ________ protons and ________ neutrons.

14. Typically, amides will hydrolyze under ________ conditions than esters.

15. Choline is a quaternary ammonium compound with a __________ charge on the nitrogen.

16. In an ethane (c2h6) molecule, each carbon atom is bonded to ________ hydrogen atoms.

17. The carbon skeleton can vary in all of the following except __________.

18. The chemical group that helps stabilize protein structure is the __________.

19. A cycloalkane ________.

20. The carbon-carbon triple bond of an alkyne is composed of ________.

21. A mole of yellow photons of wavelength 527 nm has ________ kj of energy.

22. The ionized or dissociated carboxyl group may be written as __________.

23. 1-methylcyclopentanol is classified as ________.

24. A gas under constant pressure will ____________ when ____________.

25. Stanley miller's experiments were significant because he demonstrated that __________.

26. Of the bonds below, ________ is the least polar.

27. Enantiomers are molecules that _____.

28. Enantiomers are __________.

29. Dopamine,c8h11no2, has ____________ degrees of unsaturation.

30. A secondary alcohol has a hydroxyl group bonded to a(n) ________.

31. A saturated hydrocarbon is an organic compound which contains hydrogen and carbon joined _____.

32. A carbon atom with four single bonds will be ____________hybridized.

8. The functional groups shown are the ___ group, the _ group, and the _____ group.

13. An atom with z = 26 and a = 58 contains protons and neutrons.

24. A gas under constant pressure will when .