Isomerism structural and stereoisomerism and IUPAC nomenclature basics - One Line Questions

1. What is the IUPAC name for the compound with the structure: CH3-CH(OH)-CH2-CH3? — Butan-2-ol
2. What is the IUPAC name for the compound CH3-CH(Cl)-CH2-CH3? — 2-Chlorobutane
3. Which of the following is an example of metamerism? — Diethyl ether and Methyl propyl ether
4. Which of the following is an example of chain isomerism? — Butane and Isobutane
5. The IUPAC name for the compound with the structure: Cl-CH2-CH2-Cl is: — 1,2-Dichloroethane
6. What is the IUPAC name for CH3-CH(CH3)-CH2-CH3? — 2-Methylbutane
7. What is the IUPAC name for CH3-CH2-CH2-OH? — Propan-1-ol
8. The IUPAC name for the following structure: (CH3)3C-CH2-CH3 is: — 2,2-Dimethylbutane
9. What does the prefix 'cyclo-' indicate in IUPAC nomenclature? — A ring structure
10. A mixture of equal amounts of two enantiomers is called: — A racemic mixture
11. The IUPAC name for the following structure: CH3-CH=CH-CH3 is: — But-2-ene
12. The IUPAC name for the following alkene: CH2=CH-CH2-CH3 is: — But-1-ene
13. What is the IUPAC name for the compound CH3-C(=O)-CH2-CH3? — Butanone
14. Which of the following pairs represents functional isomers? — Ethanol and Dimethyl ether
15. What is the IUPAC name for the compound with the structure: CH3-CH2-C(=O)-CH3? — Butanone
16. Which type of isomerism arises due to different arrangements of atoms or groups in space? — Stereoisomerism
17. Which of the following is NOT a type of structural isomerism? — Geometrical isomerism
18. Which of the following is a type of stereoisomerism? — Geometrical isomerism
19. Compounds that have the same molecular formula and the same carbon skeleton but differ in the position of a substituent or functional group are known as: — Positional isomers
20. Two compounds having the same molecular formula but different functional groups are called: — Functional isomers
21. A compound that is superimposable on its mirror image is: — Achiral
22. A molecule that has a plane of symmetry is: — Both B and C
23. A chiral molecule that possesses a plane of symmetry is called a: — Meso compound
24. Which of the following is a pair of enantiomers? — (R)-2-chlorobutane and (S)-2-chlorobutane
25. Molecules that are non-superimposable mirror images of each other are called: — Enantiomers
26. Stereoisomers that are not enantiomers are called: — Diastereomers
27. What is the IUPAC name for CH3-CH2-O-CH2-CH3? — Ethoxyethane
28. Which of the following is a type of structural isomerism? — Positional isomerism
29. What is the IUPAC name for CH3-CH2-COOH? — Propanoic acid
30. Which of the following compounds exhibits tautomerism? — Acetone
31. Which of the following pairs are positional isomers? — 1-Butyne and 2-Butyne
32. Which of the following is a type of stereoisomerism that arises from restricted rotation around single bonds? — Conformational isomerism
33. Chirality is a property of a molecule that: — Is non-superimposable on its mirror image
34. Enantiomers have: — Both A and B
35. Which of the following molecules contains a chiral center? — 2-Chlorobutane
36. What is the IUPAC name for the compound: CH3-CH2-NH-CH3? — N-Methylethanamine
37. A molecule with the formula C4H10O can exhibit which type of isomerism? — Metamerism and positional isomerism
38. The 'cis' isomer in geometrical isomerism has similar groups on: — The same side of the double bond
39. Which type of isomerism arises from restricted rotation around a single bond? — Conformational isomerism
40. Tautomerism is a special case of: — Functional isomerism
41. Two compounds with the same molecular formula but different carbon skeletons are called: — Chain isomers
42. Compounds that have the same molecular formula but differ in the nature or number of alkyl groups attached to a polyvalent atom are called: — Metamers
43. Which of the following is a requirement for geometrical isomerism in alkenes? — Two different groups on each carbon of the double bond
44. Optical activity is the ability of a chiral compound to: — Rotate plane-polarized light
45. Diastereomers have: — Same connectivity, different spatial arrangement, and are not mirror images.
46. Which of the following is a correct IUPAC name? — 2-Methylpropan-2-ol
47. Which of the following is NOT an IUPAC naming rule? — Use prefixes like 'iso', 'sec', 'tert' for branches.
48. Geometrical isomerism is typically observed in compounds with: — Double bonds or rings
49. What is the fundamental difference between structural isomerism and stereoisomerism? — Structural isomers have different connectivity of atoms, while stereoisomers have the same connectivity but different spatial arrangement.
50. The 'trans' isomer in geometrical isomerism has similar groups on: — Opposite sides of the double bond
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