1. Halofonns are trihalogen derivatives of

a) \(\mathrm{C}_2 \mathrm{H}_6\)

b) \(\mathrm{CH}_4\)

c) \(\mathrm{C}_3 \mathrm{H}_8\)

d) \(\mathrm{C}_2 \mathrm{H}_4\)

2. In haloalkanes, halogen atom is bonded to hybridized carbon atom of an alkyl group.

a) \(\mathrm{sp}\)

b) \(s p^2\)

c) \(\mathrm{sp}^3\)

d) \(\operatorname{sp}^3 d\)

3. Primary, secondary and tertiary alkyl halides are derivatives of alkanes.

a) monohalogen

b) dihalogen

c) trihalogen

d) tetrahalogen

4. Which of the following is known as Freon?

a) \(\mathrm{CCl}_2 \mathrm{~F}_2\)

b) \(\mathrm{CHCl}_3\)

c) \(\mathrm{CH}_2 \mathrm{~F}_2\)

d) \(\mathrm{CHF}_3\)

5. Number of secondary alkyl halides possible for \(\mathrm{C}_3 \mathrm{H}_{11} \mathrm{Cl}\) are

a) 2

b) 3

c) 4

d) 5

6. Chloroform is slowly oxidised by air in the presence of light to form

a) chloropicrin

b) phosgene

c) dichloromethane

d) freon

7. Which of the following reactions is NOT an electrophilic substitution reaction of haloarenes?

a) Friedel-Craft's reaction

b) Nitration

c) Halogenation

d) Wurtz-Fittig reaction

8. The IUPAC name of chloroform is

a) chloromethane

b) halomethane

c) trichloromethane

d) chlorotrimethane

9. The IUPAC name of the given compound is

a) 2-Methyl-1-chlorobutane

b) 1-Chloro-2,2-dimethylpropane

c) 2,2-Dimethyl-1-chloropentane

d) 2,2-Dimethyl-3-chloropropane

10. The IUPAC name of isobutyl chloride is

a) 1-chloro-2-methylbutane

b) 1-chloro-2-methylpropane

c) 2-chlorobutane

d) 2-chloro-2-methylpropane

11. \(\mathrm{CH}_3-\mathrm{CH}-\mathrm{CHCl}-\mathrm{CH}_3\) is

a) 3-chloro-2-ethylbutane

b) 2-chloro-3-ethylpentane

c) 2-chloro-3-ethylbutane

d) 2-chloro-3-methylpentane

12. How many different isomers are possible for the molecular formula \(\mathrm{C}_3 \mathrm{H}_6 \mathrm{Cl}_2\) ?

a) 8

b) 6

c) 4

d) 2

13. Nitrating mixture is

a) conc. \(\mathrm{HNO}_3+\) conc. \(\mathrm{H}_2 \mathrm{SO}_4\)

b) conc. \(\mathrm{HNO}_3+\) conc. \(\mathrm{HCI}\)

c) conc. HCI + conc. \(\mathrm{H}_2 \mathrm{SO}_4\)

d) conc. \(\mathrm{HNO}_3+\) conc. \(\mathrm{NaOH}\)

14. The molecular formula of DDT has _ chlorine atoms.

a) 5

b) 4

c) 3

d) 2

15. In the energy profile diagram of \(\mathrm{S}_{\mathrm{N}}{ }^2\) mechanism, difference in energies of products and reactants is denoted as

a) \(\Delta \mathrm{H}\)

b) \(\Delta \mathrm{E}\)

c) \(E_3\)

d) \(\Delta \mathrm{U}\)

16. In \(\mathrm{S}_{\mathrm{N}}^2\) mechanism, the rate of reaction is proportional to concentration of

a) only substrate

b) only reagent

c) both substrate and reagent

d) neither substrate nor reagent

17. The order of reactivities of the following alkyl halides for \(\mathrm{S}_{\mathrm{N}}^2\) reaction is

a) \(\mathrm{RF}>\mathrm{RCI}>\mathrm{RB}_{\mathrm{r}}>\mathrm{RI}\)

b) \(\mathrm{RF}>\mathrm{RBr}>\mathrm{RCI}>\mathrm{RI}\)

c) \(\mathrm{RCI}>\mathrm{RBr}>\mathrm{RF}>\mathrm{RI}\)

d) \(\mathrm{RI}>\mathrm{RBr}>\mathrm{RCI}>\mathrm{RF}\)

18. Depletion of ozone layer is caused by

a) freons

b) alkanes

c) Grignard reagents d) carboxylic acids

19. What is \(\mathrm{A}\) and \(\mathrm{B}\) in given reaction ? 

20. Molecular formula of dichloromethane is

a) \(\mathrm{CHCl}_3\)

b) \(\mathrm{CCl}_4\)

c) \(\mathrm{CH}_2 \mathrm{Cl}_2\)

d) \(\mathrm{CH}_3 \mathrm{Cl}\)

21. Which of the following reactions are most common in alkyl halides?

a) Nucleophilic substitution

b) Nucleophilic addition

c) Electrophilic addition

d) Electrophilic substitution

22. Wurtz synthesis is carried out by treating

a) alkyl halide with anhydrous soudim hydroxide in dry ether

b) alkyl halide with sodalime in dry ether

c) alkyl halide with sodium metal in dry ether

d) alkyl halide in aqueous solution of sodium hydroxide

23. The reaction of phosphorus tribromide with ethanol gives_derivative of alkanes.

a) monohalogen

b) dihalogen

c) trihalogen

d) polyhalogen

24. The \(\mathrm{C}-\mathrm{X}\) bond cleavage in aryl halide is more difficult than the \(\mathrm{C}-\mathrm{X}\) bond cleavage in alkyl halide due to

a) electromeric effect

b) positive inductive effect

c) negative inductive effect

d) resonance effect

25. \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{KCN}\) (aq.) \(\longrightarrow \mathrm{X}+\mathrm{Y}\). Compounds \(\mathrm{X}\) and \(\mathrm{Y}\) are respectively.

a) \(\mathrm{C}_6 \mathrm{H}_6, \mathrm{KCl}\)

b) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CN}, \mathrm{KCl}\)

c) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_3, \mathrm{KCl}\)

d) None of these

26. Why is chloroform stored into dark coloured bottles?

a) To prevent it from evaporating.

b) To protect it from moisture.

c) To prevent it from oxidation to form phosgene.

d) To prevent its reaction with glass.

27. Dipole moment of chlorobenzene is

a) more than cyclohexyl chloride

b) lower than cyclohexyl chloride

c) equal to cyclohexyl chloride

d) none ofthese

28. If two halogen atoms are attached to same carbon atom of an alkane, it is called as

a) alkyl halide

b) alkylene halide

c) alkylidenehalide d) aryl halide

29. The general molecular formula of monohalogen derivatives of alkanes is

a) \(\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}} \mathrm{X}_2\)

b) \(\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}}+{ }_1 \mathrm{X}\)

c) \(\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}-1} \mathrm{X}_3\)

d) \(\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}} \mathrm{X}\)

30. Isopropyl halide is a alkyl halide.

a) primary

b) secondary

c) tertiary

d) all of these

31. IUPAC name of \(\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CHI}-\mathrm{CH}_3\) is

a) 2-Iodo-4,4-dimethylbutane

b) 4-Iodo-2,2-dimethylpentane

c) 3-Iodo-4,4-dimethylpentane

d) 2-Iodo-4,4-dimethylpentane

32. In direct iodination of an alkane, the reverse reaction due to ill is prevented by using

a) mercuric oxide

b) iodic acid

c) dil. nitric acid

d) all of these

33. \(\mathrm{A} \mathrm{S}_{\mathrm{N}}^2\) reaction takes place with

a) retention of configuration

b) inversion of configuration

c) racemisation

d) all of these

34. Lucas reagent is an equimolar mixture of

a) concentrated \(\mathrm{HCI}+\) anhydrous \(\mathrm{ZnCl}_2\)

b) dilute \(\mathrm{HCI}+\) hydrated \(\mathrm{ZnCl}_2\)

c) concentrated \(\mathrm{HNO}_3+\) anhydrous zeci,

d) concentrated \(\mathrm{HCI}+\) anhydrous \(\mathrm{MgCl}_2\)

35. According to Markownikoffs rule, negative part of reagent adds to that doubly bonded carbon atom of an unsymmetrical alkene which carries

a) less number of carbon atoms

b) more number of hydrogen atoms

c) less number of hydrogen atoms

d) no hydrogen atoms

36. Anti-Markownikoffs rule is followed in the presence of

a) hydrogen peroxide

b) benzoyl chloride

c) phosphorus pentoxide

d) anhydrous aluminium chloride

37. Which of the following is the best reagent to convert alcohol into alkyl chloride?

a) \(\mathrm{PCh}\)

b) cone. \(\mathrm{HCI}\)

c) PCIs

d) \(\mathrm{SOCh}\)

38. Which reaction is useful to convert lower alkanes into higher alkanes ?

a) Halogenation of alkene

b) Wurtz synthesis

c) Williamson's synthesis

d) Sandmeyer's reaction

39. When ethyl bromide" and methyl bromide separately undergo Wurtz reaction the products formed are respectively.

a) ethane and propane

b) ethane and methane

c) butane and ethane

d) propane and butane

40. Grignard reagent is useful in the preparation of

a) alkane

b) ethers

c) alcohols

d) all of these

41. Which of the following reagent does NOT represent the example of electrophilic substitution reaction?

a) \(\mathrm{Cl}_2\) and anhydrous \(\mathrm{FeCl}_3\)

b) Conc, \(\mathrm{H}_2 \mathrm{SO}_4\)

c) Nitrating mixture

d) Anhydrous \(\mathrm{CuCN}\) and \(\mathrm{NaCN}\)

42. Carbon-halogen bond is strongest in which among the following?

a) \(\mathrm{CH}_3 \mathrm{Cl}\)

b) \(\mathrm{CH}_3 \mathrm{Br}\)

c) \(\mathrm{CH}_3 \mathrm{~F}\)

d) \(\mathrm{CH}_3 \mathrm{I}\)

43. The atoms or groups which lose electron show effect and the atoms or groups which withdraw electrons show effect.

a) + I and \(-I\)

b) \(-\mathrm{I}\) and + I

44. Propene undergoes addition of \(\mathrm{HBr}\) in the presence of benzoyl peroxide to give __ as major product.

a) l-Bromobutane

b) 2-Bromobntane

c) 1-Bromopropane

d) 2-Bromopropane

45. Saytzeffs rule states that alkene is major product in dehydrogenation of an alkyl halide.

a) more substituted

b) less substituted

c) less branched

d) dehydrated

46. Which of the following is a primary alkyl halide?

a) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CHCICH}_3\)

b) \(\mathrm{CH}_3 \mathrm{CHCICH}_2 \mathrm{CH}_3\)

c) \(\left(\mathrm{CH}_3\right)_2 \mathrm{CHCH}_2 \mathrm{CI}\)

d) \(\left(\mathrm{CH}_3\right)_3 \mathrm{CCI}\)

47. The IUPAC name of tert-Butyl chloride is

a) 1-Chloro-2,2-dimethylethane

b) 1-Chloro-2-methylpropane

c) 2-Chlorobutane

d) 2-Chloro-2-methylpropane

48. Which of the following alkyl halides is hydrolysed by \(\mathrm{S}_{\mathrm{N}}{ }^1\) mechanism ?

a) \(\mathrm{CH}_3-\mathrm{Br}\)

b) \(\mathrm{CH}_3 \mathrm{CH}_2-\mathrm{Br}\)

c) \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2-\mathrm{Br}\)

d) \(\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{Br}\)

49. Which of the following alkyl halides is hydrolysed by \(\mathrm{S}_{\mathrm{N}}{ }^2\) mechanism ?

a) \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}\)

b) \(\mathrm{CH}_3 \mathrm{Br}\)

c) \(\mathrm{CH}_2=\mathrm{CHCH}_2 \mathrm{Br}\)

d) \(\left(\mathrm{CH}_3\right)_3 \mathrm{CBr}\)

50. The product formed when ethyl bromide reacts with alcoholic silver cyanide is

a) ethyl isocyanide

b) propionitrile

c) methyl isocyanide d) acetonitrile

51. When 2-Chlorol:mtane is treated with alcoholic \(\mathrm{KOH}\), the major product formed is

a) butane

b) but-2-ene

c) but-l-ene

d) but-2-yne

52. Iodoform is used in medicine as an

a) antiseptic

b) anaesthetic agent

c) antipyretic

d) antibiotic

53. \(\mathrm{Mg}\) reacts with \(\mathrm{RBr}\) best in

a) dry ether

b) acetone

c) benzene

d) \(\mathrm{CCl}_4\)

54. The IUPAC name of the compound shown below is

a) 2-Bromo-6-chlorocyclohex-1-ene

b) 6-Bromo-2-chlorocyclohexene

c) 3-Bromo-l-chlorocyclohex-1-ene

d) 1-Bromo- 3-chlorocyclohex -2-ene

55. The number of possible optical isomers is given by the formula

a) \(4^n\)

b) \(3^a\)

c) \(1^{\mathrm{n}}\)

d) \(2^{\circ}\)

56. The racemic mixture of an optically active compound is

a) dextro rotatory

b) laevo rotatory

c) optically inactive

d) optically active

57. A molecule is said to be chiral if it

a) contains a plane of symmetry

b) contains a centre of symmetry

c) cannot be superimposed on its mirror

d) exists as cis-trans isomers

58. What is the sequence of priority for the following structure ?

a) \(\mathrm{NH}_2, \mathrm{ClCH}_2, \mathrm{CH}_3, \mathrm{H}\)

b) \(\mathrm{NH}_2, \mathrm{H}, \mathrm{ClCH}_2, \mathrm{CH}_3\),

c) \(\mathrm{CICH}_2, \mathrm{NH}_2, \mathrm{CH}_3, \mathrm{H}\)

d) \(\mathrm{CH}_3, \mathrm{NH}_2, \mathrm{CICH}_2, \mathrm{H}\)

60. Which of the following carbocations is least stable?

61. But-1-ene on reaction with \(\mathrm{HCl}\) in the presence of sodium peroxide yields

a) n-butyl chloride

b) isobutyl chloride

c) secondary butyl chloride

d) tertiary butyl chloride

62. Carbon atom in methyl carbocation contains how many pairs of electrons?

a) 8

b) 4

c) 3

d) 5