MDCAT XII Chemistry Organic Compounds and Nomenclature Online Test-2

Instructions for MDCAT XII Chemistry Organic Compounds and Nomenclature Online Test-2:

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Test Details:

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

274

Created on April 13, 2025 By

medicoengineer.com

MDCAT XII Chemistry Organic Compounds and Nomenclature Online Test-2

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NameEmailPhone Number

1 / 50

1. Choose the derivative of hydrocarbon:

2 methyl 1 propene
3 ethyl 2 pentanol
2,3 dimethyl butane
ethyl butanoate

a) 1,3

b) 1,2,3,4

c) 2,4

d) 1,3,4

2 / 50

2. Reactions of organic compounds are slower than inorganic because of:

A. strong π bond

B. molecularity level

C. weak sigma

D. strong sigma

a) A,D

b) D

c) A,B,D

d) B,D

3 / 50

3. Which of the following has the highest octane number

a) Pentane

b) Neopentane

c) Iso pentane

d) Cyclopentane

4 / 50

4. Which of the following is incorrect about homologous series:

a) Same reactivity

b) Different solubility

c) Different general formula

d) Different alkyl group

5 / 50

5. Which of the following is not position isomer:

a) 1 propene and 2 propene

b) 1 propanol and 2 propanol

c) 1 chlorobutane and 2 chlorobutane

d) All are position isomers

6 / 50

6. Organic compounds are in millions due to

Catenation of carbon with N, O, S
Catenation of carbon with carbon
Isomerism

a) 1, 2, 3

b) 1, 3

c) 2, 3

d) 2

7 / 50

7. Total isomers of dimethylbenzene C₈H₁₀ with benzene ring is

a) 3

b) 4

c) 5

d) 2

8 / 50

8. Melting point and radius of bulky ball is

a) 2800°C, 1nm

b) 2800K, 1nm

c) 2800°C, 1mm

d) 2800°C, 0.5nm

9 / 50

9. Which isomers arise from homologous series?

a) Functional isomers

b) Chain isomer

c) Long chain

d) Metamer

10 / 50

10. According to this case:
“1-propanol has more melting and boiling point than propane because”:

a) M.P. depends upon alkyl group only

b) M.P. and B.P. depend upon functional group only

c) M.P. and B.P. sometimes depend upon functional group

d) None of these

11 / 50

11. The colour of coal tar is?

a) Thick greyish black

b) Thin greyish black

c) Thin black liquid

d) Thick black liquid

12 / 50

12. Which of the following show metamer:

Diethyl ketone
Methyl propanoate
Methyl ethyl ketone
Butyl amine

a) 1, 2, 3, 4

b) 1, 2, 3

c) 1, 2

d) 1

13 / 50

13. Dipole moment of trans-but-2-ene is

a) 1

b) 0.8

c) 0.6

d) 0

14 / 50

14. Saba accidentally mixed equal portions of glucose and fructose solutions. Both are optically active when separate. What happens to the mixture?

a) Optically active but with reduced rotation

b) No effect on the rotation

c) Both enhance the rotation

d) The mixture becomes optically inactive

15 / 50

15. Pick the molecule which do not show geometrical isomerism:

a) 2-butene

b) 1,2-dimethyl cyclobutane

c) 2 methyl pent-1-ene

d) 3 methyl hex-2-ene

16 / 50

16. How many isomers of C₃H₆O exist?

a) 2 total

b) 3 total

c) 4 total

d) 5 total

17 / 50

17. Scientists discovered the box each of 1 mole having Methane and Ethane in it respectively. According to homologous series mass difference is:

a) 14 amu

b) 28 amu

c) 14 g

d) 28 g

18 / 50

18. Which of the following is the example of keto-enol tautomerism?

a) Ethenol and Acetone

b) Ethenol and Ethanal

c) Propenol and Propanal

d) Propanone and Propenol

19 / 50

19. Choose the organic compound:

a) CH₄

b) Sodium propanoate

c) Pyridine

d) All

20 / 50

20. Percentage of carbon content in bituminous (soft) coal:

a) 70–80%

b) 60–70%

c) 70–85%

d) 60–80%

21 / 50

21. Which compound is used by Wohler to generate urea?

a) Ammonium cyanide

b) Sodium carbonate

c) Ammonium carbonate

d) Ammonium cyanate

22 / 50

22. Which of the following is an example of practical synthesis?

a) Formation of cumene

b) Formation of taxol

c) Formation of vaccine (COVID-19)

d) Formation of Ibuprofen

23 / 50

23. Reforming occurs in the presence of catalyst called:

a) Ni

b) (C₂H₅)₄Pb

c) Octane

d) Pt

24 / 50

24. Polyethylene terephthalate is the polymer of:

a) Dicarboxylic acid and dial

b) Dibasic acid and dial

c) Dibasic acid and diol

d) Terephthalic acid and ethylene-1,2-di-al

25 / 50

25. Buckyball has:

a) (12) – 6-member rings

b) (12) – 5-member rings and ___

c) (20) – 5-member rings

d) None of these

26 / 50

26. Ethylene glycol is:

a) Anti-soluble

b) Freezing agent

c) Anti-freezing and non-coolants

d) Coolants and anti-freezing

27 / 50

27. Carboxylic acid derivative containing nitrogen in it:

a) C≡N

b) O=C–X

c) O=C–NH₂

d) CH₃–NH₂

28 / 50

28. When the light is passed from A and B having molecular formula C₄H₆O₆. A rotates light while light from B moves straight then both are:

a) Isomers but racemic mixture

b) Isomer and both optically active

c) Isomer and both optically inactive

d) Isomer and diastereomers

29 / 50

29. When light is passed through 2-chloro-but-2-ene, then in which direction does light rotate?

a) Dextro rotatory

b) Levo rotatory

c) - rotatory

d) No rotation occurs

30 / 50

30. Isomers of 2-butene due to restriction of rotation because of π bond:

a) 3

b) 2

c) 4

d) 6

31 / 50

31. Which of the following are isomers of each other:

A. 1-propene, 2-propene
B. 1-chlorobutane, 2-chlorobutane
C. Acetone, Propanal
D. 2-propanol, Iso-propyl alcohol

a) A, B, C ,D

b) B, C,D

c) B, C

d) A, B , C

32 / 50

32. Which of the following does not show position isomerism?

A. Acid halide

B. Acid amide

C. Ester

D. Disubstituted benzene

a) A, B, C, D

b) A, B, C

c) B, D

d) A, D

33 / 50

33.

a) Position isomers

b) Chain isomers

c) Functional metamers

d) Not isomers

34 / 50

34. 3-pentanol and 3-methyl-2-butanol are:

a) Chain and position isomers

b) Position but not chain

c) Chain only

d) Not isomers

35 / 50

35. __________ isomer of methyl cyclopropane having ring is:

a) 2-butene

b) Isobutylene

c) Cyclobutane

d) Methyl cyclopropane

36 / 50

36. The number of hydrogen bonded to the tertiary carbon of tertiary butanol.

a) 1

b) 2

c) 3

d) 0

37 / 50

37. Bhagwan Das filled two balloons having formula of C_nH_2n + 2O. The balloon (A) was the first member showing metamer, while balloon (B) does not show metamer. How many (B) isomers can be made?

a) 3

b) 5

c) 4

d) 2

38 / 50

38. Reaction of organic compound occurs fast if any:

A - heating

B- catalyst

C- mixing

a) A,B

b) A,B,C

c) B,C

d) A,C

39 / 50

39. Hydrocarbon obtained from fractional distillation of coal tar:

a) Naphthalene

b) pyridine

c) Phenol

d) All of them

40 / 50

40. Which is used as nail polish remover?

a) Acetaldehyde

b) Ethyne

c) Dimethyl ketone

d) None of them

41 / 50

41. When light passes through 2-chloropropene, in which direction light travels?

a) Clockwise

b) Straight

c) Anticlockwise

d) Curvilinear

42 / 50

42. Priority of -OH is greater than -Cl; what is the name of given compound.

a) 5-chloro-2-hydroxy pentane

b) 2-hydroxy-5-chloropentance

c) 4-hydroxy-1-chloropentane

d) 1-chloro-4-hydroxy-pentane

43 / 50

43. Which of the following is the best example of tautomerism?

a) A

b) B

c) C

d) D

44 / 50

44. First saturated H.C. showing isomerism:

a) 1-chloro butane

b) 2-chloro butane

c) butane

d) propane

45 / 50

45. The boiling point of 2,4-dimethyl-octane is greater than octane because of ________.

a) length of carbon

b) No. of Hydrogen bond

c) branching of methyl

d) A and C

46 / 50

46. When two –OH groups in propane are replaced by two –Cl atoms, what is the maximum number of isomers that can be formed, and how many new isomers are formed compared to the original?

a) 4, 1

b) 4, 0

c) 3, 1

d) 3, 0

47 / 50

47. Quality of Petroleum increased by using (Pt) in :

a) Refining of Petroleum

b) Reforming of Phenol

c) Distillation of Petroleum

d) Reforming of Petroleum

48 / 50

48. Find the hydrocarbon which doesn't show isomerism:

a) CH₃Cl

b) C₃H₇Cl

c) C₅H₁₁Cl

d) none of these

49 / 50

49. Three compounds (A,B,C) having the same molecular formula:

A is an isomer of B because of shifting of proton
A is an isomer of C because of Functional group

Then B and C are ??

a) Functional group isomers

b) Metamers

c) Isomers but ring chain

d) Tautomers

50 / 50

50. Azhar discovered two atoms; one is ethyl alcohol, and the other is ethane. Melting and Boiling which of the following is greater than the other?

a) Ethyl alcohol due to hydrogen bond

b) Ethyl alcohol due to due to functional group

c) Ethane due to sigma bond

d) Ethane due to hydrogen bond

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Instructions for MDCAT XII Chemistry Organic Compounds and Nomenclature Online Test-2:

Test Details:

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