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 16 of 27
- A. Metamerism
- B. Tautomerism
- C. Position isomerism
- D. Structural Isomerism
Explanation: Tautomerism is the type of isomerism arises due to shifting of proton from one atom to other in the same molecule.
Correct answer: Tautomerism- A. 2
- B. 5
- C. 3
- D. 4
Explanation: The correct answer is A) 2. In organic chemistry, isomerism is primarily categorized into two main types: Structural Isomerism and…
Correct answer: 2- A. Stereoisomerism
- B. Metamerism
- C. Positional isomerism
- D. Tautomerism
Explanation: The correct answer is Tautomerism. Acetaldehyde and vinyl alcohol are examples of tautomers, which are isomers that can readily…
Correct answer: Tautomerism- A. 3
- B. 4
- C. 8
- D. 9
Explanation: The maximum number of stereoisomers that a molecule can have is 2^n,where n is the number of chiral centres.A molecule with three chiral…
Correct answer: 8- A. 1
- B. 2
- C. 3
- D. 4
Explanation: The compound whose half part of molecule is a mirror images of the other half,is called ,meso compound.Generally,a meso compound has two…
Correct answer: 1- A. Rotatory
- B. Laevorotatory
- C. Dextrorotatory
- D. I- form
Explanation: The isomer which rotates the plane of polarized light towards the right that is clockwise,is known as dextrorotatory or d form.
Correct answer: Dextrorotatory- A. Metamerism
- B. Stereoisomerism
- C. Geometrical isomerism
- D. Tautomerism
Explanation: Optical isomers,also known as enantiomers,are another type of stereoisomerism.This occurs when molecules have the same moleculer formula…
Correct answer: Stereoisomerism- A. Geometric isomerism
- B. Chain isomerism
- C. Metamerism
- D. Tautomerism
Explanation: Geometric isomerism is the type of stereoisomerism. While chain isomerism,metamerism and tautomerism are the types of structural isomerism.
Correct answer: Geometric isomerism- A. Chain
- B. Position
- C. Functional
- D. Metamerism
Explanation: In 1-chloropropane and 2-chloropropane, the only difference lies in the position of the chlorine atom, leading to position isomerism.
Correct answer: Position- A. have the same structure.
- B. have different compositions of elements.
- C. have the same molecular formula
- D. have a different content of the isotopes of hydrogen.
Explanation: Two isomeric forms of a saturated hydrocarbon have the same moleculer formula.
Correct answer: have the same molecular formula- A. C7H16
- B. C7H14
- C. C5H10
- D. C3H8
Explanation: C3H8 is the compound which cannot exhibit isomerism,as it contains only 3 carbon atoms.Isomerism is possible only with hydrocarbons…
Correct answer: C3H8312. Which of the following compounds is a functional group isomer of C2H5OH, ethanol (ethyl alcohol)?
- A. ethanal, CH3CHO
- B. acetic acid, CH3COOH
- C. diethyl ether, (C2H5)2O
- D. dimethyl ether, (CH3)2O
Explanation: Dimethyl ether and ethyl alcohol have same molecular formula but different functional groups and hence they are the functional isomers of…
Correct answer: dimethyl ether, (CH3)2O- A. 4-octene
- B. 2-pentene
- C. 3-hexene
- D. 1-hexene
Explanation: The formula of 1-hexene is H3C-CH2-CH2-CH2-CH=Ch2.The one carbon atom bearing a double bond is attached to two H atoms.Hence,it does not…
Correct answer: 1-hexene- A. position isomerism
- B. functional group isomerism
- C. chain isomerism
- D. None of above
Explanation: Positional isomers have the same chemical formula but have an atom or group in different positions.
Correct answer: position isomerism- A. Position isomerism
- B. Functional group isomerism
- C. Chain isomerism
- D. None of above
Explanation: It is the type of isomers formed by compounds that have the same moleculer formula but different functional groups.For example,propanone…
Correct answer: Functional group isomerism316. Compounds which have the same molecular formula but the different structural formula is called:
- A. structural isomer
- B. optical isomer
- C. molecular isomer
- D. Position isomer
Explanation: Structural isomers are molecules that have the same moleculer formula,but have a different arrangement of the atoms in space.
Correct answer: structural isomer- A. position isomerism
- B. functional group isomerism
- C. chain isomerism
- D. All of above
Explanation: The correct answer is 'All of above' because it encompasses all six types of structural isomerism mentioned in the question.
Correct answer: All of above- A. propene
- B. 2-methylpropene
- C. 2-butene
- D. 2-methyl -2-butene
Explanation: 2-Butene may exist as cis and trans isomers.The cis isomer has the two methyl groups on the same side and the trans-isomer has the two…
Correct answer: 2-butene- A. each forms an equal number of isomers for a given compound
- B. If in a compound one is present then so is the other
- C. both are included in stereoisomerism
- D. they have no similarity
Explanation: Both the given types of Isomerism optical and geometric belong to same category of stereoisomers.This is the major similarity among the…
Correct answer: both are included in stereoisomerism- A. 1, 2-dichloro -1 - pentene
- B. 1, 3 - dichloro - 2 - pentene
- C. 1, 1 - dichloro - 1 - pentene
- D. 1, 4 - dichloro - 2 - pentene
Explanation: In geometrical isomerism,the atoms are bonded by a double bond that does not rotate but it can also happen because of the ring structure.
Correct answer: 1, 1 - dichloro - 1 - pentene