Free Isomerism MCQs with Answers
77 Isomerism MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Isomerism occurs when compounds have the same molecular formula but different atom arrangements or spatial orientations. The content includes chain, position, functional, metameric and tautomeric isomerism, along with geometrical and optical isomerism, including cis-trans forms, E/Z notation, chirality and enantiomers.
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77 questions · page 2 of 4
- A. Chain isomerism & Position isomerism
- B. Chain isomerism & Functional group isomerism
- C. Chain isomerism, Position isomerism & Functional group isomerism
- D. Position isomerism, Functional group isomerism & Metamerism
Explanation: 1-Butanol (n-butanol or butyl alcohol) exhibits several types of isomerism:Chain Isomerism: As mentioned earlier, 1-butanol is a…
Correct answer: Chain isomerism, Position isomerism & Functional group isomerism- A. Lactic acid
- B. Acetic acid
- C. 1-Butene
- D. 2-Butene
Explanation: 2-Butene does exhibit geometrical isomerism. It has a double bond between the second and third carbon atoms, and the different spatial…
Correct answer: 2-Butene- A. Two
- B. One
- C. Three
- D. Four
Explanation: Lactic acid, with the chemical formula CH3CH(OH)COOH, contains one chiral center.
Correct answer: One- A. Position isomers
- B. Functional group isomers
- C. Chain isomers
- D. Tautomers
Explanation: Isomers are of two kinds: structural isomers and stereo-isomers. (We have to consider structural isomers only for this question because we…
Correct answer: Functional group isomers- A. Tautomers
- B. Functional
- C. Position
- D. Metamers
Explanation: They are functional isomers due to the fact that they have the same molecular composition but different functional groups with valeric…
Correct answer: Functional- A. 2
- B. 3
- C. 4
- D. 6
Explanation: The compound having the molecular formula C3H7Cl will have two different structural isomers which are 1-chloropropane and 2-chloropropane.
Correct answer: 2- A. Dextrorotatory
- B. Levorotatory
- C. Presence of an asymmetric carbon
- D. Molecular dysymmetry
Explanation: Necessary conditions for optical activity:The compound must contain an asymmetrical carbon atom.The molecule must contain a chiral…
Correct answer: Presence of an asymmetric carbon- A. Functional isomers
- B. Position isomers
- C. Chain isomers
- D. Metamers
Explanation: Metamerism isomerism is due to the unequal distribution of carbon atoms on either side of the functional group.
Correct answer: Metamers- A. Metamerism
- B. Functional group isomerism
- C. Position isomerism
- D. Chain isomerism
Explanation: Functional group isomerism is the correct answer because it refers to isomers that have the same molecular formula but differ in…
Correct answer: Functional group isomerism- A. Position isomerism
- B. Tautomerism
- C. Metamerism
- D. Cis-trans isomerism
Explanation: Metamerism is a type of structural isomerism where isomers have the same functional group but differ in the arrangement of alkyl groups…
Correct answer: Metamerism- A. Alkynes
- B. Nitroalkanes
- C. Carboxylic acid
- D. Alcohol
Explanation: In carboxylic acids position of functional group does not change therefore they do not show positional isomerism.
Correct answer: Carboxylic acid- A. Metamerism
- B. Tautomerism
- C. Position
- D. Functional
Explanation: A tautomer of a compound refers to the isomer of the compound which only differs in the position of protons and electrons so, B is…
Correct answer: Tautomerism- A. Four
- B. Five
- C. Three
- D. Six
Explanation: Butanol (also called butyl alcohol) is a four-carbon alcohol with a formula of C4H9OH, which occurs in five isomeric structures (four…
Correct answer: Four- A. Chain isomerism
- B. Position isomerism
- C. Cis-trans isomensm
- D. Optical isomerism
Explanation: Chain isomerism is a type of isomerism arises due to the difference in the nature of the carbon chain.
Correct answer: Chain isomerism- A. 1
- B. 3
- C. 2
- D. 5
Explanation: A chiral centre is an atom especially in an organic molecule that has four unique atoms or groups attached to it.
Correct answer: 3- A. Amino acids
- B. Amines
- C. Carboxylic acids
- D. All of these
Explanation: Tautomerism is a form of isomerism involving the migration of a proton.
Correct answer: Amino acids- A. 1-hexene
- B. 2-hexene
- C. 3-hexene
- D. 4-hexene
Explanation: The formula of 1-hexene is Ch3-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
- B. Chain
- C. Functional group
- D. Metamers
Explanation: Functional group Functional Isomerism is the type of isomerism formed by compounds that have same molecular formula but different…
Correct answer: Functional group- A. Position isomerism
- B. Functional group isomerism
- C. Metamerism
- D. Cis trans isomerism
Explanation: Metmerism is commonly found in ethers.In this isomerism,the nature of alkyl groups may differ.This occurs due to the unequal distribution…
Correct answer: Metamerism40. The compounds in which similar groups are present on the same side of a double bond are called as _?
- A. Trans isomers
- B. Positional isomers
- C. Cis isomers
- D. None of these
Explanation: In geometric isomerism, the prefix "cis-" (from Latin, meaning "on this side") is used to describe the isomer where two similar or…
Correct answer: Cis isomers