XII Chemistry Alkyl Halides and Amines Online Test Mdcat-2024

Instructions for Alkyl Halides and Amines Online Test Mdcat-2024:

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NameEmailPhone Number

1 / 50

1. Which C-X bond has the highest bond energy per mole?

a) C-Br

b) C-Cl

c) C-F

d) C-I

2 / 50

2. Why are alkyl halides slightly soluble in water?

a) They form hydrogen bonds with water.

b) They do not form hydrogen bonds with water

c) They dissolve completely in water.

d) none

3 / 50

3. What is the physical state of alkyl halides with a lower number of carbon atoms at room temperature?

a) Solid

b) Gas or Liquid

c) Only Liquid

d) all are correct

4 / 50

4. Diazonium salt will be obtained when amine reacts with ____.

a) HNO3

b) SO3

c) H2SO4

d) SO4

5 / 50

5. When methyl amine reacts with acetylchloride in presence of ____.

a) Anhydrous ether

b) LiAlH4

c) Pyridine

d) Hydrogen peroxide

6 / 50

6. When primary amines react with aldehyde and ketone to produce ___ and also Referred as _______

a) Amide , Markowni

b) Amine , Schiff base

c) Imine , Warts base

d) None

7 / 50

7. Amines behave as ______

a) Electrophile

b) acid

c) Nucleophile

d) Both b and c

8 / 50

8. Amine is produced when ____.

a) Oxidation of nitrites

b) Acylation of ammonia by alkyl halide

c) Reduction of amides

d) Both A and C

9 / 50

9. Which of the following is correct about amine?

a) Amine are insoluble in water

b) Solubility increase with increase in non-polar hydrocarbon chain

c) Amines have high M.P and B.P than those hydrocarbons of comparable molecular mass.

d) All correct

10 / 50

10. Ethyl amine is _____.

a) Solid

b) Liquid

c) Gas

d) None

11 / 50

11. Many drugs including antiobiotics , anti depressants and antihistamine contain _____ functional group.

a) Amide

b) Carboxyl

c) Amine

d) None

12 / 50

12. 3° alcohol is produced when RMgX reacts with ____ on hydrolysis:

a) HCHO

b) CH3CO

c) CO2

d) CH3COCH2

13 / 50

13. Aniline is a ________ amine

a) 1°

b) 2°

c) 3°

d) none

14 / 50

14.

a) a

b) b

c) c

d) d

15 / 50

15. Dehydro halogenation of alkyl halide is ?

a) Exothermic reaction

b) Endothermic reaction

c) Nucleophilic substitution

d) Addition reaction

16 / 50

16. Which size of alkyl group is more easy to form Grignard reagent ?

a) Larger

b) Smaller

c) Both

d) None

17 / 50

17. __ is used as insecticide .

a) Methylcobalamine

b) Magnetic resonance image

c) Dimethyl zinc

d) Tetraethyl lead

18 / 50

18. Methylcobalamine is a derived from _____.

a) Protein

b) Vit-A

c) Vit-B12

d) Both b and c

19 / 50

19. ___reaction depends upon polar solvents____ is not favoured.

a) Substitution , elimination

b) Substitution , Substitution

c) Elimination , Substitution

d) none

20 / 50

20. Nucleophilic substitution reaction occur when nucleophile attack with ______.

a) α-hydrogen

b) β-hydrogen

c) β-carbon

d) α-carbon

21 / 50

21. In which reaction transition state is formed ?

a) SN2 and E1

b) SN1 and E1

c) SN2 and E2

d) none

22 / 50

22. In which mechanism rate of reaction depends only on concentration of reactants(substrate)?

a) E1 and SN2

b) SN2 and E2

c) E1 and E2

d) None

23 / 50

23. In which reaction of alkyl halide we get alkene?

a) Nucleophilic substitution

b) Grignard reagent

c) Elimination reaction

d) None

24 / 50

24. Which statement regarding hydrogen bonding is correct with respect to amines

a) Amines form hydrogen bonds with each other

b) Amines form hydrogen bonds only when dissolved in water.

c) Lower amines form hydrogen bond, and higher amines don't.

d) Amines do not form hydrogen bonds at all.

25 / 50

25. When Methyl Amine reacts with acetyl chloride, in presence of pyridine, gives___

a) N-methyl acetamide

b) N-ethylacetamide

c) Diazonium chloride

d) Ethyldiazonium salt.

26 / 50

26. Primary amines react with aldehydes to produce

a) amides

b) imines

c) shiff bases

d) Both B and C.

27 / 50

27. When primary amines react with excess of alkyl halides, the end product is

a) Primary amide

b) Secondary amine

c) Tertiary Amine

d) None of them

28 / 50

28. Reduction of amides with lithium aluminum hydrides gives

a) Primary amines

b) Secondary Amides

c) primary amides

d) secondary amines

29 / 50

29. Methyl cyanide on catalytic hydrogenation gives

a) methyl amine.

b) ethyl amine

c) dimethyl amine

d) diethyl amine.

30 / 50

30. Choose the right trend of solubility of amines.

a) Tri-methyl amine > di-methyl amine > methyl amine.

b) di-methyl amine > tri-methyl amine > methyl-amine.

c) Methyl-amine > di-methyl amine > tri-methyl amine

d) Amines are not soluble in water.

31 / 50

31. Lower members of amines exist as ______ at room temperature, however, higher members are ______

a) Solids, Liquids.

b) Liquids, gases

c) Gases, Liquids

d) Liquids, Solids.

32 / 50

32. Grignard reagant reacts with primary amine to produce _____

a) Alkane

b) Aldehyde

c) Ester

d) None of these

33 / 50

33.

In SN₂ reactions, the hybridization of carbon in moving from substart to transition state changes from ?

a) sp to sp³

b) sp³ to sp²

c) sp to sp²

d) Sp² to sp³

34 / 50

34. Which one of the following is not a nucleophile:

a) CH^-3-NH^-2

b) OH

c) Nucleophilic addition

d) CH⁺³

35 / 50

35. Acetic acid can be obtained from Ch3MgI with treatment of:

a) water

b) CO2

c) NH3

d) CO

36 / 50

36. Grignard reagent is reactive due to :

a) polarity of C-Mg bond

b) presence of halogen atom

c) presence of Mg atom

d) Electrophillic carbon

37 / 50

37. which of the following is not associated with SN2 reaction?

a) 100%inversion of configuration

b) 2nd order kinetics

c) Tartiary alkyl halide

d) change of hybridization from sp3 to sp2 in transition stage

38 / 50

38. An alkyl halide can be converted into alcohol by the:

a) Addition reaction

b) Substitution reaction

c) Dehydrohalogenation reaction

d) None of the above

39 / 50

39. What is the order of SN2 reaction of the alkyl halide?

a) RCl > RBr > RF > RI

b) RI > RBr > RCl > RF

c) R-F > R-Cl > RBr > RI

d) RBr > RI > RCl > RF

40 / 50

40. Which one of the following species is not an electrophile?

a) NH3

b) Br+

c) H+

d) BF3

41 / 50

41. Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield ?

a) primary alcohol

b) secondary alcohol

c) tertiary alcohol

d) dihydric alcohol

42 / 50

42. Alkyl halides undergo a type of reaction ?

a) Nucleophilic substitution

b) Nucleophilic addition

c) Elimination

d) both A & C

43 / 50

43. For which mechanisms the first step involved is the same?

a) E1 + E2

b) E2 + SN2

c) E1 and SN1

d) SN1 and SN2

44 / 50

44. Alkyl halides are considered to be very reactive compounds towards nucleophile because?

a) they have an electrophilic carbon

b) . they have an electrophilic carbon & a good leaving group

c) they have an electrophilic carbon & a bad leaving group

d) they have a nucleophilic carbon & a good leaving group

45 / 50

45. Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?

a) CH3-X

b) CH3)3 C-CH2 - X

c) CH3)2 CH - X

d) CH3)3 C-X

46 / 50

46. When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed?

a) 2 moles of ethane

b) 1 mole of ethane

c) 2 moles of butane

d) 1 mole of butane

47 / 50

47. In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms ?

a) two

b) three

c) one

d) four

48 / 50

48. The best method of preparation of alkyl halides is a reaction of alcohol with ?

a) Zn/HCI

b) SOCI2 / Pyridine

c) PCI3

d) PCl5

49 / 50

49. When ethyl alcohol reacts with thionyl chloride important formed with alkyl halide these important products are:

a) SO2+ HCL2

b) SO2

c) SO2 + HCL

d) SO3

50 / 50

50. Alkyl halide is insoluble in water because of:

a) lack of hydrogen bond

b) presence of hydrogen bond

c) lack of primary bond

d) none

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Instructions for Alkyl Halides and Amines Online Test Mdcat-2024:

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