MDCAT XII Chemistry Alkyl Halides and Amines Online Test-2

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Test Details:

Subject: Chemistry
Class: 2nd year or 12
Chapter Name: Alkyl Halides and Amines
Test: MDCAT 2025
Book: Sindh Textbook
Total No. Of MCQS: 50 MCQS
Time Allowed: 50 Minutes
Price: Free

144

Created on April 25, 2025 By

medicoengineer.com

MDCAT XII Chemistry Alkyl halides and Amines Online Test-2

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NameEmailPhone Number

1 / 50

1. Which reaction mechanism is common for tertiary alkyl halides?

a) SN1

b) SN2

c) E2

d) Free Radical

2 / 50

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

a) CH3CH2Cl

b) (CH3)2CHCl

c) (CH3)3CCl

d) C6H5Cl

3 / 50

3. Why alkyl halides are considered to be very reactive compounds towards nucleophile?

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

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

c) they have an electrophilic carbon

d) they have an electrophilic carbon & a good leaving group

4 / 50

4. Which of the following is most stable?

a) Ethyl carbocation

b) Isopropyl carbocation

c) Tertiary butyl carbocation

d) Methyl carbocation

5 / 50

5. E1 and SN1 occur on secondary alkyl halide which step is common

a) Slow step

b) Fast step

c) Both step

d) none of them

6 / 50

6. Victor Grignard got noble prize in

a) 1911

b) 1812

c) 1912

d) 1811

7 / 50

7. If we increase the temperature , it will favor:

a) Substitution

b) Elimination

c) Addition

d) No effect

8 / 50

8. Basicity order of amine is

a) 3 > 2 > 1

b) 2 > 3 > 1

c) 2 > 1 > 3

d) 1 > 2 > 3

9 / 50

9. When propyl amine reacts with HNO2 and HCl product is

a) Propyl diazonium Acid

b) Propyl diazonium Salt

c) Propyl diazonium base

d) Ethyl diazonium Salt

10 / 50

10. Which of the following has highest bond energy per molecule?

a) C-Cl

b) C-F

c) C-Br

d) C-I

11 / 50

11. Good leaving and good nucleophile is

a) F⁻

b) I+

c) Cl⁻

d) I–

12 / 50

12. Lucas reagent is

a) H2/Pb

b) HCl + ZnCl2

c) HCl, HNO3

d) HCl NaNO2

13 / 50

13. Order of Reaction of the reaction between ethyl chloride and pure water to form ethyl alcohol and HCl

a) 2

b) 1

c) 1.5

d) None of them

14 / 50

14. Which of the following is not nucleophile?

a) AsH3

b) InH3

c) SeH4

d) PH3

15 / 50

15. Which of the following contain Beta hydrogen

A) Isobutyl chloride

B) Methyl chloride

C) Neo pentyl chloride

D) Ethyl chloride

a) A,B,C,D

b) A, D

c) B,C,D

d) B, C

16 / 50

16. CH₃MgBr reacts with acetaldehyde, and the product is

a) Sec: propyl Alcohol

b) Propyl Alcohol

c) Isopropyl Alcohol

d) A and C

17 / 50

17. 2 bromo, 2 methyl propane prefer

a) SN1

b) SN2

c) E2

d) E1

18 / 50

18. CH₃OH reacts with SOCl₂. Product is

a) CH4 + SO2 + HCl

b) CH3Cl + SO2(L) + HCl(L)

c) CH3Cl + SO3 + HCl

d) none of these

19 / 50

19. Geometry of Transition state and carbocation is

a) sp3 - sp2

b) sp3 - sp3

c) sp2 - sp2

d) sp2 - sp3

20 / 50

20. Tertiary alkyl halide does not react through the process of SN2 mechanism because

a) Insolubility

b) Instability

c) Steric hindrance

d) Inductive effect

21 / 50

21. butyl chloride reacts with alcoholic KOH major product is

a) Butyl alcohol

b) 1 butene

c) 2 Butene

d) 2 butanol

22 / 50

22. Imines are also known as

a) Schiff base

b) Schiff Acid

c) Schiff molecule

d) None of them

23 / 50

23. Methyl cyanide on catalytic hydrogenation produces

a) Methane

b) Ethane

c) Methane amine

d) Ethane amine

24 / 50

24. Bond angle of SP3 hybrid orbital when hydrogen is no longer bonded to nitrogen

a) 107°

b) 108°

c) 109°

d) 109.5°

25 / 50

25. Which of the following is more soluble in polar solvent ?

a) tri propylamine

b) tri ethylamine

c) N methyl N ethyl ethane amine

d) N ethyl N methyl propyl amine

26 / 50

26. Ethyl chloride is a reacted with polarized molecule by

a) nucleophilic substitution

b) nucleophilic edition

c) nucleophilic transformation

d) A and B

27 / 50

27. Grignard reagent is produced in the presence of which of the following reagent

1=Pure ether

2=Dry ether

3=Anhydrous ether

4=Hydrous ether

a) A,B,C,D

b) A,B,C

c) B,C,D

d) A,B

28 / 50

28. Methyl cobalamin is the derivative of

a) vitamin B1

b) vitamin b4

c) vitamin B6

d) none of these

29 / 50

29. Organometallic compound is used as contrasting agent in

1.MRI

2.HIV

3.tuberculosis

4.cancer

a) A,B,C,D

b) A

c) B,C,D

d) A,B

30 / 50

30. 3-degree carbocation is more stable than secondary carbocation because

a) having more charge and more carbon atom

b) electron accepting tendency of alkyl group

c) showing more activation because of positive charge

d) none of these

31 / 50

31. When ethyl chloride react with aqueous KOH rate of SN2 reaction depends upon:

Ethyl chloride
KOH
H2O

a) A,B,C

b) A,B

c) A,C

d) A

32 / 50

32. Source of OR nucleophile is:

a) ether

b) alcohol

c) Ester

d) ketone

33 / 50

33. Alkyl halide with Different halogen and lower corban are:

a) gas

b) liquid

c) solid

d) A and B

34 / 50

34. When Grignard reagent such as methyl magnesium bromide react with methyl formate product is:

a) ketone

b) acetaldehyde

c) alcohol

d) carboxylic acid

35 / 50

35. Which of the following amine when will not react with nitrous acid to give nitrogen:

a) Ethane amine

b) N,N dimethyl methane amine

c) 2 amino propane

d) All of these give

36 / 50

36. When reaction is occurred between two compounds stability of product is greater than reactant and its intermediate pathway referred through dotted line process of reaction is:

a) SN2

b) E1

c) E2

d) SN1

37 / 50

37. When ethyl alcohol Reacts with HCL product is

a) Ethyl chloride

b) Ethene

c) Ethane

d) None

38 / 50

38. Reaction performance lab under strict conditions in which 2 methyl 1 chloropropane undergoes with KOX having some polar solvent in it product found is:

a) 2 methyl 1 propene

b) 2 methyl propane

c) 2 methyl 1 hydroxy propane

d) 2 methyl 1 hydroxy propene

39 / 50

39. Bomo 2 dimethyl propane undergoes an elimination reaction product is:

a) 2 diamethyl-prop-1-ene

b) 2,2 dimethyl prop-2-ene

c) 2,2 dimethyl propane

d) no reaction occurs

40 / 50

40. Which Rx out of the following follows both SN2 and E2?

a) methyl chloride

b) 2 Bromo 2 methyl Propane

c) C₂H₅ – Cl

d) those who follow substitution, don’t follow elimination

41 / 50

41. Good Nu and good leaving group is :

a) Br⁻

b) I⁻

c) F⁻

d) Cl⁻

42 / 50

42. 100% inversion of configuration occurs during alkyl halide reaction in which type of reaction inversion becomes half?

a) SN2

b) E2

c) SN₁

d) E1

43 / 50

43. Carbonation is formed intermediate in which type of Reaction producing unsaturated compound:

a) SN2

b) E2

c) SN₁

d) E1

44 / 50

44. Reagent used for Dehydrohalogenation
(1) Alc. KOH
(2) NaNH₂ in liquid NH₃
(3) H2SO4
(4) soda lime

a) 1,23

b) 1,2

c) 1,2,3,4

d) 1

45 / 50

45. When marsh gas reacts with Cl₂ gas, the product is further mixed with Alcoholic KOH. The product is:

a) Alkane

b) Alkyl halide

c) Alkene

d) None of these

46 / 50

46. Propyne reacts with 2 moles of HBr, which alkyl halide is produced:

a) 1,1 dibromo ethane

b) 1,2 dibromo propane

c) 1,1 dibromo ethene

d) None of these

47 / 50

47. 3 methyl but-1-ene react with HBr to form:

a) 2 bromo 3 methyl butane

b) 3 methyl 2 bromo butane

c) 2 bromo 2 methyl butane

d) 2 methyl 2 bromo butane

48 / 50

48. In SN1 mechanism :

a) formation of carbocation a second step

b) it is single step mechanism

c) double step mechanism

d) attack of Nu is slow step

49 / 50

49. What is the first step of the reaction of 2-bromo-2-methyl-propane with HCL

Attack of Nu
formation of carbonation
rearrangement of carbonation
formation of the transition state
removal of hydrogen

a) 1,2,3,5

b) 1,4,5

c) 1,2,5

d) 1,2

50 / 50

50. Choose the correct option of the following?

a) R-X produced from a R-H by replacing H with X through electrophilic substitution reaction

b) pyridine Is a catalyst which activates the production of RX form thionyl chloride

c) A and B

d) None

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MDCAT XII Chemistry Alkyl Halides and Amines Online Test-2

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