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 27 of 27
- A. They are highly reactive compounds.
- B. They are very stable compounds and can be isolated easily.
- C. They have synthetic importance.
- D. They are represented by the general formula RMgX.
Explanation: The correct answer is They are very stable compounds and can be isolated easily.
Correct answer: They are very stable compounds and can be isolated easily.- A. Carbocation
- B. Oxonium ion
- C. Carbanion
- D. Oxalate ion
Explanation: When ethoxy ethane is treated with concentrated H2SO4, the oxygen atom in ethoxy ethane donates a lone pair to the hydrogen ion from the…
Correct answer: Oxonium ion- A. CH3-CH2-C-Br
- B. CH3-C-O-C- CH3
- C. CH3- CH2-C-NH2
- D. None of the above
Explanation: All of the above compounds can be hydrolyzed by water to split into 2 smaller molecules so option D is correct
Correct answer: None of the above- A. R-S-R
- B. R-S-H
- C. R-O-R
- D. R-O-H
Explanation: Mercaptans are organosulfur molecules composed of carbon, hydrogen, and sulfur.
Correct answer: R-S-H- A. Methyl amine
- B. Dimethyl amine
- C. Methyl propyl amine
- D. Butyl amine
Explanation: The greater the basicity of amines the higher its reactivity. Order of basicity if the −R group is −CH3 group:Secondary amine > primary…
Correct answer: Dimethyl amine- A. Br+
- B. AlCl3
- C. NH4
- D. NO3+
Explanation: Ammonium ion (NH4+) is not an electrophile. It is a positively charged species, but it does not have an electron-deficient center that can…
Correct answer: NH4- A. Propyne
- B. Propanone
- C. Propanal
- D. Propene
Explanation: Nail polish removers are mainly composed of propanone, which is more commonly known as acetone.
Correct answer: Propanone- A. Position isomerism
- B. Functional group isomerism
- C. Chain isomerism
- D. All of above
Explanation: Position isomerism: C2H11OH, which represents a molecule with two carbon atoms, exhibits position isomerism.
Correct answer: Position isomerism- A. CH3OH
- B. C2H5OCH3
- C. CH3OCH3
- D. C2H5OC2H5
Explanation: CH3OCH3 is an isomer of ethanol. It is called dimethyl ether, which has the same molecular formula as ethanol but a different structural…
Correct answer: CH3OCH3- A. Chain isomerism
- B. Structural isomerism
- C. Geometrical isomerism
- D. Position isomerism
Explanation: Geometric isomers possess the same structural formula containing a double bond and differ only in respect of the arrangements about the…
Correct answer: Geometrical isomerism- A. Chain isomers
- B. Position isomers
- C. Functional group isomers
- D. Both (A) and (B)
Explanation: Functional group isomers differ in the functional groups within their structures, leading to distinct chemical reactions and variations in…
Correct answer: Functional group isomers- A. Conformational isomers
- B. Metamers
- C. Geometrical isomers
- D. Enantiomers
Explanation: Metamers are the compounds having the same molecular formula but different position of atoms or groups on the either side of bridging…
Correct answer: Metamers- A. Structural
- B. Optical
- C. Stereo
- D. None of the above
Explanation: Stereoisomers are isomers that have the same composition (that is, the same parts) but that differ in the orientation of those parts in…
Correct answer: Stereo- A. 2
- B. 4
- C. 5
- D. 3
Explanation: Pentane (C5H12) is an organic compound with five carbon atoms. Pentane has three isomers that are n-pentane, Iso-pentane (methyl butane)…
Correct answer: 3- A. Metamerism
- B. Optical isomerism
- C. Tautomerism
- D. None
Explanation: It gives metamerism which is when compounds having the same molecular formula but different alkyl groups on either side of functional…
Correct answer: Metamerism- A. 2
- B. 4
- C. 8
- D. 5
Explanation: For the chemical formula C2H6O, which represents an alcohol (ethanol), there are 8 isomeric structures possible.
Correct answer: 8