1. : Vicinal dihalides also undergo both substitution and elimination reactions. The ideal reagent helpful and used to convert Cl-CH₂-CH₂-Cl into CH≡CH is
(A) Hot sodium hydroxide in ethanol
(B) Hot aqueous sodium hydroxide
(C) Hot sodamide
(D) Hot and ethanolic potash
2. : Methanol can be obtained from CH3MgI by treatment with which of the following?
(A) H₂O
(B) CO₂
(C) HCHO
(D) CINH₂
3. : The reagent _________ can react with 1-chlorobutane to give substitution product.
(A) AlCl₃
(B) KOH-CH₃OH
(C) Mg/ether
(D) NaCN
4. : Reaction of RMgBr with CO₂ is an example of which of the following?
(A) Electrophilic addition
(B) Simple addition
(C) Nucleophilic substitution
(D) Nucleophilic addition
5. : Which among the following is not a nucleophile?
(A) CH₃NH₂
(B) CH₃
(C) CH₂
(D) OH⁻
6. : Acetic acid can be obtained from CH3MgI by treatment with which of the following?
(A) CO₂
(B) HCHO
(C) H₂O
(D) CINH₂
7. : Silver salt of a carboxylic acid upon refluxing with bromine in CCl₄ gives the corresponding alkyl halide. The reaction is known as
(A) Wittig reaction
(B) Kolbe reaction
(C) Hunsdiecker reaction
(D) Fittig reaction
8. : Which reagents cannot be helpful and used for the synthesis of alkyl halides from an alcohol?
(A) SOCl₂
(B) PCl₃
(C) PCl₅
(D) NaCl
9. : Which is not a nucleophile?
(A) H₂O
(B) H₂S
(C) BF₃
(D) NH₃
10. : Alkyl halides react with Zn-metal to form the reaction called
(A) Frankland’s reaction
(B) Fittig’s reaction
(C) Clemensen’s reduction
(D) Wurtz’s reaction
11. : Which alkyl halide is the most reactive towards attacking nucleophile?
(A) CH₃F
(B) CH₃Br
(C) CH₃Cl
(D) CH₃I
12. : Ethyl chloride reacts with silver oxide in the presence of moisture to form
(A) Ether
(B) Ethanol
(C) Acetone
(D) Acetic acid
13. : _______ are monohaloderivatives of alkanes.
(A) Alkyl halides
(B) Allyl halides
(C) Aryl halides
(D) None of A, B, and C
14. : Which method is helpful and used to prepare any alkyl halide?
(A) ROH + SOCl₂ → RCl + SO₂ + HCl
(B) ROH + PCl₃ → RCl + H₃PO₃
(C) ROH + PCl₃ →→→ ROH + HCl + POCl₃
(D) ROH + HCl–ZnCl₂ → RCl + H₂O
15. : Chlorination of benzene with excess chlorine in the presence of FeCl₃ as Lewis acid gives which of the following?
(A) Chlorobenzene as a major product
(B) A mixture of o- and p-dichlorobenzene
(C) p-Dichlorobenzene as the only product
(D) o-Dichlorobenzene as major product
16. : Which is the ideal reagent for converting an alcohol into the corresponding chloride?
(A) PCl₅
(B) PCl₃
(C) SOCl₂
(D) Zn/HCl
17. : A reaction in which an atom or group in a molecule is replaced by another atom or group is called
(A) Substitution reaction
(B) Elimination reaction
(C) Cycloaddition reaction
(D) Addition reaction
18. : Which chloride is the most reactive towards unimolecular nucleophilic substitution reactions?
(A) iso-Butyl chloride
(B) t-Butyl chloride
(C) n-Propyl chloride
(D) Benzyl chloride
19. : Reactions in which two atoms or groups are removed from two adjacent C-atoms of the substrate molecule to form a multiple bond are called
(A) Inversion
(B) Addition
(C) Beta-elimination
(D) Substitution
20. : In beta-elimination reaction, the nucleophile attacks on which of the following?
(A) Gamma-H
(B) Alpha-H
(C) Beta-H
(D) Alpha-C
21. : The substance which donates a pair of electrons to electrophile is called
(A) Nucleophile
(B) Electrophile
(C) Lewis acid
(D) None of A, B, and C
22. : In unimolecular reactions, the reaction completes in
(A) Three steps
(B) Two steps
(C) Single step
(D) None of A, B, and C
23. : Which is not associated with SN2 mechanism?
(A) Inversion of configuration
(B) Change of hybridization from sp³ to sp² in transition
(C) Second order kinetics
(D) Tertiary alkyl halide
24. : Grignard reagent is reactive due to which of the following?
(A) Presence of Mg atom
(B) Presence of halogen
(C) The polarity of C-Mg bond
(D) Electrophilic carbon
25. : Which one of the following would make an SN2 mechanism more likely?
(A) Bulky substituents near the halogen
(B) A reactive nucleophile
(C) A tertiary carbocation intermediate
(D) A polar solvent
26. : For which compounds is the rate of hydrolysis by aqueous alkali most likely to be independent of the hydroxide ion concentration?
(A) 2-bromo-2-methyl butane
(B) 2-bromobutane
(C) 1-iodobutane
(D) 1-chlorobutane
27. : Ketone can be obtained from CH3MgI with which of the following?
(A) H2O
(B) HCHO
(C) CH3CN
(D) CO2
28. : What is the number of optically active compounds in the isomers of C3H5Br3?
(A) 1
(B) 4
(C) 3
(D) 2
29. : Which of the following is a good solvent for Grignard reagent formation?
(A) t-butanol
(B) tetrahydrofuran
(C) difluoro ethane
(D) dimethyl ether
30. : Tertiary alcohol can be obtained from CH3MgI by treatment with which one is NOT correct?
(A) Ketone
(B) HCHO
(C) CO2
(D) H2O
31. : Secondary alcohol can be obtained from CH3MgI by treatment with which of the following?
(A) H2O
(B) HCHO
(C) CINH2c
(D) CH3CHO
32. : 1-Bromobutane on reaction with alcoholic potassium hydroxide gives
(A) 1-butanal
(B) 1-butyne
(C) 2-butene
(D) 1-butene
33. : Which is not a nucleophile?
(A) Cl–
(B) CH3+
(C) OH–
(D) Br–
34. : The SN2 reaction can ideally be carried out with which of the following?
(A) Primary alkyl halides
(B) Secondary alkyl halides
(C) Tertiary alkyl halides
(D) All of A, B, and C
35. : How many structural isomers are possible for C4H9Br?
(A) 5
(B) 2
(C) 3
(D) 4
36. : The SN1 reaction can ideally be carried out with which of the following?
(A) Primary alkyl halides
(B) Secondary alkyl halides
(C) Tertiary alkyl halides
(D) All of A, B, and C
37. : The rate of nucleophilic substitution reaction depends on
(A) Structure of substrate
(B) Nature of nucleophile
(C) Nature of solvent
(D) All of A, B, and C