Free Fundamental Principles of Organic Chemistry MCQs with Answers
536 Fundamental Principles of Organic Chemistry MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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Read the Fundamental Principles of Organic Chemistry notesFree MDCAT chapter notes with key terms536 questions · page 23 of 27
- A. CH2 = CH2
- B. CH3 - O - CH3
- C. CH3 - NH2
- D. C6H6
Explanation: Aromatic compounds are also called arenes and the only correct option showing a benzene ring / aromatic compound is option D.
Correct answer: C6H6- A. Animals
- B. Plants
- C. Bacteria
- D. All of these
Explanation: Option A: According to the vital force theory, animals were considered to possess a vital force or vital principle that enabled them to…
Correct answer: All of these- A. Arrangement of atoms in the compound
- B. Arrangement of electrons in the compound
- C. Arrangement of orbitals that are involved in bonding
- D. Lewis structure of compounds
Explanation: Option A: Arrangement of atoms in the compound: This option refers to the structural formula's main purpose, which is to depict the…
Correct answer: Arrangement of atoms in the compound- A. Candle wax
- B. Kerosine oil
- C. Paraffin oil
- D. Vegetable ghee
Explanation: Candle wax is typically made from natural waxes, such as beeswax or plant-based waxes like soy wax or palm wax, or synthetic waxes like…
Correct answer: Vegetable ghee- A. Inorganic
- B. Polar
- C. Ionic
- D. Non-polar
Explanation: The electronegativity of carbon is 2.55 and of hydrogen is 2.2, the difference between them is 0.33.
Correct answer: Non-polar- A. Hydrogen
- B. Oxygen
- C. Carbon
- D. Both Hydrogen and Carbon
Explanation: Hydrocarbons, as the name suggests, consist of "carbon" and "hydrogen" both.
Correct answer: Both Hydrogen and Carbon- A. Ionic
- B. Non-ionic
- C. Non-covalent.
- D. Covalent
Explanation: Organic compounds are covalent in nature. This means that the atoms in organic compounds are held together by covalent bonds, which are…
Correct answer: Covalent- A. Volatile
- B. Non-volatile
- C. Fissible
- D. None of these options are correct
Explanation: Volatile organic compounds (VOCs) are organic chemicals (containing Carbon) that have a high vapor pressure at room temperature.
Correct answer: Volatile- A. CH3
- B. CH2
- C. CH
- D. CH4
Explanation: CH4, C2H6, and C3H8 are all consecutive alkanes in the homologous series, each differing from the next and previous compound by the…
Correct answer: CH2- A. Wohler
- B. Berzelius
- C. Kesley
- D. Lyll
Explanation: According to the vital source theory, organic compounds must have their origin in living organisms and could not be synthesized by…
Correct answer: Berzelius- A. Class
- B. Group
- C. Homologous series
- D. None of these options are correct
Explanation: Compounds that have the same functional group are part of the same homologous series. Eg: alcohol (OH) has the same homologous series.
Correct answer: Homologous series- A. Closed chain hydrocarbons
- B. Open chain hydrocarbons
- C. Ring compounds
- D. Alicyclic compounds
Explanation: OPTION A: Closed-chain hydrocarbons are also called cyclic or alicyclic hydrocarbons.
Correct answer: Open chain hydrocarbons- A. Lewis
- B. Wohler
- C. Greek Philosophers
- D. Berzillus
Explanation: The vital force theory stated that organic compounds could not be made in a lab, but needed a mysterious, God-given power that was found…
Correct answer: Wohler- A. Imides
- B. Amides
- C. Amines
- D. Carboxylic acid
Explanation: Option A : Urea doesn't belong to imides. Option: B Urea, also called carbamide, is an organic compound with the chemical formula…
Correct answer: Amides- A. Amino acids
- B. Ammonium carbonate
- C. Ammonium cyanate
- D. Xanthin
Explanation: The 'Wöhler synthesis' is the conversion of ammonium cyanate into urea. This chemical reaction was described in 1828 by Friedrich Wöhler.
Correct answer: Ammonium cyanate- A. Homocyclic compounds
- B. Alicyclic Compounds
- C. Heterocyclic compounds
- D. None of these options are correct
Explanation: Heterocyclic compounds are those that have at least two different elements as members of their rings.
Correct answer: Heterocyclic compounds- A. Aromatic compounds
- B. Branched chain compounds
- C. Alicyclic compounds
- D. None of these
Explanation: The IUPAC name of Isopentane is Methybutane having the formula: C5H12. Since it has one methyl group attached, which serves as a compound…
Correct answer: Branched chain compounds- A. 850,000
- B. Over 6 million
- C. 6 million
- D. 5 million
Explanation: Option B is correct as we know an estimated "20 million" different organic compounds.
Correct answer: Over 6 million- A. Heterocyclic compounds
- B. Alicyclic compounds
- C. Aliphatic compounds
- D. Carbocyclic compounds
Explanation: d) Carbocyclic compounds: Carbocyclic compounds are another term used to describe homocyclic compounds.
Correct answer: Carbocyclic compounds- A. Living things
- B. Non living things
- C. Fossils
- D. Sea water
Explanation: Organic compounds are obtained from living things. Among the numerous types of organic compounds, four major categories are found in all…
Correct answer: Living things